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ASHRAE’s 2019 edition of Standard 62.1 marked a pivotal step for the Indoor Air Quality Procedure (IAQP). However, it was the subsequent series of addenda that began transforming it from a conceptual alternative into a structured, data-driven design pathway. These interim updates introduced key clarifications, standardized documentation, and early guidance that laid the groundwork for broader industry adoption. The momentum continued with the fully revised ASHRAE Standard 62.1-2022, which formalized many of these advancements by introducing official verification testing, a standardized IAQP Calculator, and defined performance validation requirements. Together, these updates strengthened IAQP’s credibility and usability across design teams. Now, as ASHRAE continues to refine IAQP through new post-2022 addenda, this article reviews the most recent changes, how they build on the 2022 foundation, further align the procedure with third-party testing and data transparency, and continue to move IAQP toward confident, standardized application. IAQP Addenda Summary (2022-Present) Key updates driving IAQP’s maturation and ease of use: Addendum c (2024 0521): Addendum 62c strengthens the IAQP by introducing a calculator for mass balance equations and updating reference materials, making IAQ calculations more accurate, consistent, and easier to apply in practice. Addendum f (2025 0930): Addendum 62f strengthens the IAQP by requiring control system modes for air quality emergencies, such as economizer and demand control ventilation shutdowns and infection risk management, ensuring buildings can rapidly adapt to contaminated or high-risk conditions while maintaining safe indoor air quality and operational reliability. Addendum g (2024 1031): Addendum 62g enhances the IAQP by adding standardized documentation templates for air cleaning systems, improving consistency, transparency, and ease of demonstrating compliance with Section 6.3 requirements. Addendum i (2024 1031): Addendum 62i advances the IAQP by introducing alternative, globally recognized testing methods for formaldehyde, acetaldehyde, and acetone, reducing costs and expanding laboratory accessibility while maintaining rigorous accuracy making IAQP implementation more practical, affordable, and broadly adoptable. Addendum n (2022 0930): Addendum 62n reinforces the IAQP’s scientific credibility by mandating that filtration and air cleaning devices be tested to recognized ASHRAE or ISO standards, ensuring verified performance data, greater design reliability, and stronger assurance that IAQP-based ventilation solutions deliver the intended indoor air quality. Addendum o (2024 0501): Addendum 62o enhances the IAQP by expanding documentation requirements to include design standard edition, filter and air cleaner ratings, and last air balancing date, improving operational transparency and helping ensure ongoing alignment between design intent and actual IAQ performance. Addendum q (2024 1031): Addendum 62q updates IAQP Table 6.5 by removing the obsolete compound 1,1,1-trichloroethane and revising phenol limits per AgBB 2018, ensuring the procedure remains current, evidence-based, and aligned with modern health standards. Addendum r (2025 0430): Through Addendum 62r, the IAQP aligns with the updated EPA PM2.5 standard of 9 µg/m³, enhancing health protection and demonstrating the procedure’s commitment to staying scientifically current and responsive to evolving air quality research. Addendum s (2025 0430): The IAQP broadens its testing flexibility by adding EPA Method TO17 and updating TO11 to TO11A, expanding laboratory options, improving analytical accuracy, and lowering testing costs, making IAQ assessments more accessible and reliable. Addendum v (2025 0930): Addendum 62v updates IAQP references and Table 6.5 limits to reflect current industry standards and authorities, ensuring designs stay accurate and consistent with modern best practices. What This Means for the Industry Collectively, these addenda mark more than technical refinement, they mark a defining moment for performance-based ventilation. The IAQP has evolved from a theoretical compliance path into a practical, scalable, and verifiable design framework. One that allows engineers to achieve measurable indoor air quality while reducing energy and capital costs. With the release of standardized tools, validated testing methods, and third-party verification requirements, the IAQP has entered a new phase: accelerated adoption. Across the HVAC and building design industry, engineering firms, manufacturers, and building owners are beginning to embrace IAQP not as an exception, but as the preferred pathway for meeting both IAQ and energy goals. This adoption reflects a fundamental shift away from prescriptive ventilation rates and toward performance-based accountability. IAQP bridges the gap between indoor environmental quality, sustainability, and cost efficiency. At AirBox, we see these advancements as a validation of what we’ve built our mission around: that clean, healthy air should be scientifically verified, performance-based, and achievable at scale. The latest addenda have provided the market with the structure it needed to transition from concept to confidence, and the industry is responding. IAQP is no longer emerging; it’s establishing the new baseline for how buildings will be designed, validated, and maintained for decades to come ...

When it comes to indoor air quality (IAQ), most people think about temperature, humidity, or maybe dust. But the real challenge often lies in the invisible gaseous and particulate contaminants that can quietly impact occupant health and comfort. That’s where ASHRAE Standard 62.1-2022 steps in with clear guidance. One of the most important references in this standard is Table 6-5, which outlines specific Design Compounds and Design Limits or contaminants of concern that every building owner, engineer, and facility manager should understand. Why Table 6-5 Matters Table 6-5 identifies a set of contaminants that serve as benchmarks for evaluating indoor air quality. These pollutants may sound technical and beyond your concern, but they’re far from rare. In fact, they’re commonly released by the everyday materials, activities, and equipment that fill our buildings. By testing for and controlling these contaminants, you not only meet compliance requirements but also protect the health, productivity, and overall comfort of occupants. Everyday Sources of Table 6-5 Contaminants To make this list more practical, here’s how some of these pollutants show up in ordinary settings: Tetrachloroethylene: Often found in many cleaning products and linked with dry-cleaning chemicals. Formaldehyde: Frequently released from furniture, composite wood, building materials, and can even infiltrate from busy highways or industrial emissions through outdoor air. PM2.5 (Particulate Matter): Commonly generated by lawn care equipment, cooking activities, wildfire smoke, and even emitted by humans themselves. Benzene: Oftentimes produced by office equipment like printers and copiers, as well as cooking and combustion sources. Acetaldehyde: Common in cigarette smoke, cooking emissions, and consumer products like cosmetic aerosols. Xylenes & Toluene: Frequently emitted by paints, adhesives, solvents, and vehicle exhaust. Ozone: Can be brought in through outdoor air and produced by printers and copiers. These examples highlight that Table 6-5 isn’t an abstract regulation. It’s a reflection of real-world exposures happening every day inside buildings. Outdoor Air Risks It’s important to note that many of these same contaminants are also present outdoors and sometimes even exceed their allowable limits in certain regions. When you ventilate a building, you’re not always diluting the problem; you may actually be pulling more pollutants inside. This is especially true near highways, industrial zones, or during wildfire season. In these situations, traditional reliance on outdoor air for “freshness” can put occupants at higher risk of polluted air.   How to Mitigate Exposure The solution is not to avoid ventilation altogether, but to be smarter about how we clean and condition the air we do bring in. Air cleaners tested to ASHRAE Standards 52.2 and 145.2 are proven to remove both particulate and gaseous contaminants effectively. And if your region frequently struggles with high outdoor pollutant levels, adopting the Indoor Air Quality Procedure (IAQP) can reduce reliance on outdoor air while still ensuring compliance and safety.   The Role of IAQ Testing Because these contaminants are often odorless and invisible, they can’t be detected without testing. That’s why IAQ testing, particularly during building commissioning and ongoing facility management, is critical. Testing against Table 6-5 contaminants provides data-driven insight into indoor environments, ensuring compliance with ASHRAE Standard 62.1-2022 while also creating safer, healthier spaces. At the same time, it’s important to recognize the limitations of continuous monitoring devices. While they may seem convenient, they often require frequent calibration and can provide unreliable readings if not maintained properly. Periodic, lab-grade testing remains the gold standard for accuracy and compliance.   How AirBox Helps At AirBox, we’ve developed strict IAQ Testing protocols aligned with ASHRAE Standard 62.1-2022, designed to measure the full spectrum of Table 6-5 contaminants. Our Analytical Science Group ensures precise, repeatable results, giving you confidence that your indoor air quality meets the highest standards. Beyond testing, AirBox High-Volume Purifiers (HVPs) deliver more than compliance, they deliver control. With proven filtration technology, you can reduce outdoor air intake through IAQP by removing every contaminant listed in Table 6-5. Our Advanced Operating System (AOS) adds predictive maintenance with filter-life tracking, ensuring maximum performance without wasted replacement costs. Together, these features make AirBox the most effective way to meet standards, create healthier spaces, and protect your budget. The contaminants may be invisible, but their impact isn’t. Taking them seriously ensures safer, higher-performing indoor environments. Don’t let ASHRAE’s Table 6-5 contaminants define your indoor air quality ...

When evaluating the effectiveness of air filtration, not all test data is created equal. Two of the most important industry standards for assessing air filters are ASHRAE Standard 145.2 and ASHRAE Standard 52.2. These serve as the foundation for strategies like ASHRAE Standard 62.1-2022's Indoor Air Quality Procedure (IAQP), which uses this data to reduce outdoor air requirements in buildings, thereby unlocking energy savings and reduced capital equipment without compromising health or code compliance. These testing protocols provide standardized, repeatable performance metrics that allow for fair comparison across products. However, to apply them effectively, it is essential to understand what each test measures, how airflow influences results, and how to interpret the data when evaluating different air purification technologies. ASHRAE Standard 145.2: Gas-Phase Contaminant Removal ASHRAE Standard 145.2 outlines a method for testing the performance of gas-phase filtration systems. This includes systems that reduce volatile organic compounds (VOCs), such as formaldehyde, as well as ozone, and other chemical and gaseous pollutants from the air. This standard evaluates the single-pass removal efficiency of air filtration by introducing specific gaseous contaminants into a controlled test duct, then measuring the removal efficiency through the filter in a single pass. Key Considerations: Results are reported as a fractional removal efficiency (e.g., 60% reduction in formaldehyde in a single pass). The test is conducted at the manufacturer’s specified airflow rate (CFM), which directly affects removal efficiency. Because airflow determines contact time between air and filter media, higher flow rates can reduce efficiency even with the same media. For example, formaldehyde removal efficiency typically increases at lower airflow rates, since the contaminant has more time to interact with the filter media. It is therefore critical that the design airflow at which the filter will operate in real-life conditions matches the airflow used in the test data to ensure the reported performance is achievable in practice. ASHRAE Standard 52.2: Particulate Matter Removal ASHRAE Standard 52.2 is the industry standard for evaluating performance of air-cleaning devices as a function of particulate size. It specifically focuses on the removal of particles ranging in size from 0.3 to 10 microns, including PM2.5 and PM10. Key Considerations: Provides Minimum Efficiency Reporting Value (MERV) from 1 to 16 (higher is better). Measures efficiency across three particle size ranges: 0.3–1.0 µm, 1.0–3.0 µm, and 3.0–10.0 µm. Like 145.2, the test is performed in a controlled test duct at a defined airflow rate determined by the manufacturer. Why Airflow (CFM) Changes Everything Both ASHRAE standards measure efficiency at the airflow rate (CFM) the system is expected to operate under typical conditions. The airflow directly influences the results. Unfortunately, not all manufacturers test at the same airflow rate, nor do they consistently disclose this information. Why airflow rate matters: Lower airflow results in higher removal efficiency, as contaminants spend more time in contact with the filter media. Higher airflow results in more volume of air cleaned at the cost of lower single-pass efficiency. A balance is needed between efficacy and throughput. Air purifiers operating at lower CFM will often report higher removal efficiencies yet may clean a smaller total volume of air over time. Conversely, a unit with a lower removal efficiency but higher airflow may deliver more total clean air per hour. To make apples-to-apples comparisons, look at efficiency and tested airflow, or even better, calculate the Cleaned Air Rate (CAR) if both values are provided: CAR = Efficiency (%) × Airflow (CFM) For example: A purifier that removes 90% of a given contaminant at 500 CFM delivers 450 CAR. Another unit that removes 70% of the same given contaminant at 800 CFM delivers 560 CAR cleaning more air, faster, even with a lower efficiency rating. How to Compare Air Purifier Performance When comparing different air purifiers, keep these tips in mind: Verify the testing standards used: Make sure the product was tested according to recognized ASHRAE standards (such as 145.2 for gas-phase and 52.2 for particulate). Be cautious of self-defined standards that don’t provide meaningful or comparable data. Ask for airflow rates used during testing: Without that, efficiency numbers are only part of the story. Consider total performance: Pairing high-efficiency filtration with a smart operating system that balances airflow, pressure, and filter loading gives a better long-term solution. Look at Cleaned Air Rate (CAR): Units with higher CFM often deliver higher CAR, meaning they can clean more air faster. This can reduce the number of units needed for a space, cutting costs on equipment, installation, and ongoing maintenance. Match performance to your environment: Depending on the types of contaminants present, it may be more important to prioritize high removal efficiency for specific pollutants, such as formaldehyde, ozone, or PM2.5, rather than selecting the unit with the highest overall average efficiency. IAQP and ASHRAE Testing Standards The Indoor Air Quality Procedure, detailed in ASHRAE Standard 62.1-2022, allows facility managers and engineers to reduce outdoor air intake requirements if they can demonstrate that indoor contaminants of concern are controlled through filtration or other means. To comply with IAQP, manufacturers and system designers must show that the air purification system installed can effectively control the contaminants listed in Table 6-5, such as PM2.5, ozone, formaldehyde, and other VOCs. This is where third-party test data from ASHRAE Standards 145.2 and 52.2 becomes essential. These results are entered into the IAQP calculator to verify that indoor pollutant concentrations will remain below threshold levels as outdoor airflow is reduced. By using IAQP and equipment tested to these standards, buildings can significantly lower their reliance on outdoor air. This results in major energy savings, reduced HVAC load, and fewer installed units, all while maintaining compliance with ventilation codes and protecting occupant health. A Smarter Approach to Indoor Air Quality Decision-Making Understanding ASHRAE Standards 145.2 and 52.2 is essential for evaluating air purifier performance with real-world relevance. These standardized test methods support informed decisions, especially when using IAQP under ASHRAE Standard 62.1-2022 to reduce ventilation requirements. It is the manufacturer’s responsibility to have testing conducted by an independent laboratory to obtain credible, verifiable results. However, efficiency numbers alone don’t tell the full story. Always consider the airflow rate used during testing, the specific contaminants of concern in your space, and how the Cleaned Air Rate (CAR) aligns with your building’s needs. The goal isn’t just achieving high efficiency, but ensuring smart, effective air quality management that delivers measurable results in both occupant health and operational savings. AirBox: Engineered to Meet the Standards That Matter AirBox High-Volume Purifiers (HVPs) are engineered with these standards in mind. The AirBox HVPs are tested at real-world airflow rates and backed by third-party data to ensure reliable, code-compliant performance. Whether your facility requires high removal efficiency for specific contaminants or a high-CAR system to treat large volumes of air, AirBox offers solutions that align with ASHRAE Standards 145.2, 52.2, and the IAQP pathway. Each unit is paired with our Advanced Operating System (AOS), which intelligently manages airflow, pressure, and filter loading to maintain consistent performance over time. AirBox systems are built not just to meet performance claims on paper, but to deliver measurable results in the field. Thus, helping you improve indoor air quality, reduce energy consumption, and simplify compliance with ASHRAE. To learn more about air purification testing and the specific requirements tied to these contaminants, check out ASHRAE’s Addendum g here ...

HEPA filtration is more than a buzzword—it’s a benchmark for critical environments that can’t afford compromised air. Used across industries where air purity is non-negotiable, certified HEPA (High-Efficiency Particulate Air) filters are the proven choice for removing harmful particulate matter that threatens both human health and sensitive processes. Industries That Rely on True HEPA HEPA, the gold standard of filtration, is widely used in sectors that demand the cleanest air possible, such as: Semiconductor manufacturing Nuclear containment Biotech and pharmaceutical labs Microchip and electronics production Hospital operating rooms and isolation wards Aerospace cleanrooms High-containment BSL laboratories Defense and military applications Food and beverage clean processing If these industries trust HEPA to protect critical operations and human health, it raises an important question: why wouldn’t your facility? What Makes a HEPA Filter Legit? Not all “HEPA” claims are created equal. True, certified HEPA filters must meet strict performance standards—specifically capturing 99.97% of particles at 0.3 microns or better (some certified filters even test to 99.99%). But how do you verify that the filter in your system is performing as it should? Here’s what you should ask any air purifier manufacturer or vendor: Is the filter certified to IEST-RP-CC001? Do your filters meet or exceed ASHRAE Standard 52.2 testing? Do you have ISO 29463 or EN 1822 classification data? Can you provide independent lab results or certification documentation? What DOE (Department of Energy) or cleanroom-grade standards do you meet? Without answers to these, you may be buying a label—not a real solution. The Danger of PM2.5: Invisible, But Potent One of the biggest threats to indoor air quality today is fine particulate matter smaller than 2.5 microns (PM2.5). These particles can penetrate deep into the lungs, enter the bloodstream, and contribute to long-term health problems such as respiratory diseases, cardiovascular issues, cognitive decline, and even cancer. Because they’re invisible to the naked eye, PM2.5 often goes undetected without proper filtration in place and can be found around you in: Vehicle exhaust (diesel and gasoline engines) Industrial emissions (factories, power plants, refineries) Pollen Combustion byproducts (from burning wood, coal, oil, or natural gas) Cigarette smoke and secondhand smoke Wildfire smoke Cooking fumes (especially frying, grilling, and burning oils) Construction dust (fine dust from concrete, drywall, etc.) Agricultural burning and field dust Mold spores Biological fragments (skin flakes, bacteria, organic debris) Brake and tire wear particles (from roadways and traffic) Indoor dust (resuspended fine particles from surfaces or carpets) These microscopic pollutants are all around us—indoors and out—and their ability to bypass the body’s natural defenses makes them especially dangerous. Certified HEPA filters actively capture PM2.5 and even smaller particles with verified efficiency, unlike standard filters, making them one of the most effective tools for protecting indoor air quality. In environments where health, safety, and compliance matter, HEPA isn’t just a filter; it’s peace of mind. HEPA and IAQP The Indoor Air Quality Procedure (IAQP) provides building designers with flexibility to reduce outdoor air ventilation by demonstrating control of indoor contaminants. However, success depends on the effectiveness of the filtration system. While HEPA filtration isn’t explicitly required under IAQP, it’s hard to justify using anything less when PM2.5, one of the most dangerous and pervasive airborne pollutants, is listed in ASHRAE’s Table 6-5. HEPA filters, proven to capture 99.97% or more of particles down to 0.3 microns, offer unmatched protection against PM2.5. Beyond health, better filtration means you can confidently lower outdoor air intake, which reduces HVAC equipment sizing, capital costs, and long-term energy consumption. In short, using HEPA with IAQP isn’t just a win for indoor air quality, it’s a strategic move for cutting costs and future-proofing your building. AirBox: Built on 30+ Years of Cleanroom Expertise At AirBox, HEPA filtration isn’t a new feature, it’s the foundation. With over 30 years of experience in cleanroom design and certification, we understand what proven performance means in environments where there’s no room for error. That’s why every AirBox purifier, ranging from 500 CFM to 9,000 CFM, is equipped with certified HEPA and Advanced Molecular Adsorbent filtration for complete protection. We don’t just say “HEPA”, we prove it. With our Advanced Operating System (AOS), filter life tracking, and IAQP compliance support, we make it easy to bring cleanroom-level air quality into commercial buildings, schools, healthcare facilities, and more ...

As building codes evolve and indoor air quality (IAQ) becomes a top priority, many design teams are rethinking their approach to energy-efficient ventilation. For years, Demand Control Ventilation (DCV) has been the standard method for reducing energy consumption in commercial facilities by adjusting ventilation rates based on occupancy levels. However, an increasing number of engineers and owners are looking to the Indoor Air Quality Procedure (IAQP), a performance-based alternative that ASHRAE Standard 62.1-2022 defines and outlines as a smarter, more flexible solution. The reason? IAQP doesn’t just save energy; it can significantly reduce HVAC system design size, improve indoor air quality, and simplify long-term operation and maintenance. Limitations of Demand Control Ventilation While DCV can reduce outdoor air intake during periods of low occupancy with CO₂ monitoring, it presents several engineering and operational drawbacks: No reduction in equipment sizing: Despite reduced outdoor airflows during operation, engineers must still size systems according to the Ventilation Rate Procedure (VRP) for full design occupancy. This results in no capital cost savings on air handling units (AHUs), ductwork, cooling capacity, etc. Sensor reliability challenges: DCV depends on CO₂ sensors that are prone to drift, require frequent calibration, and can be difficult to manage across distributed systems. Inaccurate readings can lead to over-ventilation (wasting energy) or under-ventilation (risking occupant health). Increased compliance burden: ASHRAE has introduced stricter sensor calibration and accuracy requirements in recent revisions to Standard 62.1, increasing both the initial and ongoing cost and complexity for facility managers and OEMs. Limited pollutant control: DCV is occupancy-based and does not address airborne contaminants such as VOCs, PM2.5, ozone, or formaldehyde—many of which are known carcinogens or respiratory hazards. A space can meet CO₂ targets while still failing to ensure healthy indoor air. IAQP: A Smarter Performance-Based Alternative Unlike DCV, IAQP is a performance-based design method that enables reduced outdoor air rates if contaminant levels can be controlled using validated technologies such as high-efficiency filtration and air cleaning systems. This approach allows engineers to balance energy efficiency with real indoor air quality improvements. Key advantages include: Smaller HVAC systems and reduced first costs: By designing for lower ventilation rates, IAQP often requires smaller AHUs, DOAS, reduced duct runs, fewer or smaller ERVs, and more, significantly cutting first costs on new construction and depending on the air cleaning equipment, often times seeing net savings on new construction. Targeted removal of harmful pollutants: IAQP outlines harmful pollutants in ASHRAE Table 6-5, many of which are carcinogens or linked to chronic disease. By actively mitigating these contaminants with proven removal efficiency tested air cleaners, building owners gain increased occupant health and safety and a defensible strategy to reduce liability related to indoor air complaints, wellness claims, or future regulatory action. Verified performance through testing: Technicians measure and verify indoor air quality through contaminant testing, using real performance data rather than assumptions based on occupancy alone. Post-implementation Verification Testing takes out the guesswork of IAQP equipment performance. AirBox + IAQP: Integrated Solutions for Compliance and Performance AirBox delivers a turnkey solution for implementing IAQP effectively by combining engineering and design support, compliant air purification systems, comprehensive IAQ Verification Testing, compliance documents, and advanced system control with the AirBox Advanced Operating System (AOS). Our air cleaners are equipped with Certified HEPA filtration and Advanced Molecular Adsorbent media, targeting the full range of contaminants listed in ASHRAE Table 6-5 such as particulate matter and harmful gases like formaldehyde, ozone, and VOCs. This comprehensive filtration not only supports IAQP compliance but also qualifies for dual credit under ASHRAE Standard 241, helping facilities meet both indoor air quality and infection control goals. We manufactured AirBox systems in our EPA-registered facility in the USA. Our units range from 500 to 9,000 CFM and integrate seamlessly into both new construction and retrofit projects. By combining IAQP with proven solutions like AirBox, owners and engineers can: Realize CAPEX savings by downsizing HVAC equipment Achieve measurable energy savings for ongoing cost reduction Comply with evolving codes and regulations to stay ahead of industry standards Ensure verified, high-quality indoor air that prioritizes occupant health Access dual-credit pathways under ASHRAE Standard 241, supporting both infection control and IAQ objectives As expectations around indoor air quality rise, IAQP offers a future-forward path that aligns performance, compliance, and occupant health. With the right strategy and solutions, achieving better air doesn’t have to come at the cost of efficiency ...

Maintaining optimal air quality is paramount in laboratory environments. Contaminants like particulate matter, volatile organic compounds (VOCs), and pathogens can compromise research accuracy, equipment integrity, and, most importantly, the health and safety of lab personnel. While HVAC systems are a crucial component of lab ventilation, sometimes they are insufficient to achieve the required Air Changes per Hour (ACH) necessary for specific applications or to address localized air quality concerns. This is where introducing compliant air purification can make a significant difference.   Understanding the Importance of Air Changes per Hour Air changes per hour refers to the number of times the total volume of air in a room is replaced with fresh, filtered air within one hour. Consequently, higher ACH generally translates to improved indoor air quality and reduced concentration of airborne contaminants. The recommended ACH varies depending on the type of laboratory and the specific hazards present. Factors influencing the required ACH include: Type of Research: Experiments involving infectious agents, hazardous chemicals, or sensitive materials require higher ACH. Equipment Used: Equipment that generates fumes, particles, or heat can necessitate increased ventilation. Occupancy Levels: Higher occupancy rates increase bioeffluents and airborne pathogens, all of which affect ventilation demand. Regulatory Guidelines: Organizations such as ASHRAE provide guidance on ventilation requirements for specific laboratory settings.   Limitations of Existing HVAC Systems While HVAC systems play a critical role in lab ventilation, they may face limitations in achieving the desired ACH: System Capacity: Older or undersized HVAC systems may lack the capacity to provide adequate airflow for the entire lab. Distribution Issues: Air distribution problems can lead to uneven ventilation, with some areas receiving insufficient airflow. Cost of Upgrades: Upgrading the existing HVAC system can be a significant investment. Disruptions During Renovation: Major HVAC upgrades often require lab downtime and potential disruptions to research activities.   How AirBox Can Enhance ACH and Indoor Air Quality AirBox High-Volume Purifiers (HVPs) offer a flexible and cost-effective solution to supplement existing HVAC systems and improve indoor air quality in labs. Here's how they contribute: Increased Localized ACH: AirBox HVPs can be strategically placed in areas where higher ACH is required, such as around fume hoods, biosafety cabinets, or in areas with high concentrations of particulate matter. Effective Filtration: Equipped with Certified HEPA and Advanced Molecular Adsorbent filtration, AirBox HVPs capture 99.99% of airborne particles, as well as Volatile Organic Compounds (VOCs) and other harmful chemical contaminants. Minimized Maintenance: By utilizing the AirBox Advanced Operating System (AOS), facilities can integrate with their Building Management Systems (BMS) to manage, adjust, schedule, and monitor their HVPs. Additionally, the AirBox AOS allows live IAQ and filter-life tracking with integrated sensors on board. Emergency Response: AirBox HVPs can quickly address indoor air quality risk from contamination events like viral outbreaks, wildfire smoke, and more through an easy switch to ASHRAE Standard 241-2023's Infection Risk Management Mode (IRMM) to increase clean airflow. Reduced Strain on HVAC: By filtering air locally, AirBox purifiers alleviate some of the burden on the HVAC system, potentially extending its lifespan.   Conclusion: A Smarter Path to Safer, More Compliant Labs In laboratory environments where precision, safety, and regulatory compliance are non-negotiable, maintaining high indoor air quality is critical. Consequently, achieving the appropriate Air Changes per Hour (ACH) is key. While traditional HVAC systems form the backbone of lab ventilation, they often fall short when it comes to localized needs, rapid response to contaminants, or cost-effective scalability. AirBox High-Volume Purifiers bridge that gap. With certified filtration, intelligent integration, and advanced operational capabilities, AirBox solutions not only help labs meet or exceed ACH requirements, but do so without costly HVAC upgrades or disruptive renovations. Whether supplementing existing systems, supporting emergency IAQ response, or optimizing performance in high-demand zones, AirBox purifiers deliver the flexibility and control modern laboratories require. In short, boosting lab ACH isn’t just about compliance—it’s about creating a cleaner, safer, and more efficient research environment. And with AirBox, you don’t have to compromise ...

In the wake of the pandemic and amid rising awareness about the importance of indoor air quality (IAQ), school districts across the country are reassessing how they ventilate and purify the air in classrooms. One increasingly popular, but often underpublicized method is the Indoor Air Quality Procedure (IAQP), a lesser-known path to achieving ASHRAE ventilation compliance. While many facilities still follow the traditional Ventilation Rate Procedure (VRP), IAQP offers significant advantages, especially when executed with proven air purification technologies.   What is IAQP? ASHRAE Standard 62.1-2022 defines the Indoor Air Quality Procedure as an alternative method for ventilation compliance. Unlike the Ventilation Rate Procedure, which relies solely on increasing outdoor air intake, IAQP allows for a more energy conscious approach that considers indoor pollutant levels and the use of air cleaning technologies to recirculate purified air that has already been conditioned. IAQP focuses on measuring and controlling indoor contaminants like VOCs (Volatile Organic Compounds), such as formaldehyde, and particulate matter, allowing schools to tailor their ventilation strategies to real conditions rather than fixed formulas. This can lead to significant energy savings and better control of indoor air quality, particularly in climates where bringing in large volumes of outside air is energy intensive. Why Schools Are Choosing IAQP Energy Efficiency Through Reduced Outdoor Air Intake Traditional ventilation strategies require bringing in large amounts of outdoor air, which can significantly increase heating and cooling loads—especially in regions with extreme weather. IAQP allows schools to reduce outdoor air intake by safely offsetting it with high-performance air purification, leading to dramatic energy savings. This not only cuts utility costs but also reduces strain on aging HVAC systems, extending their useful life. Healthier Learning Environments Improved indoor air quality has been linked to better cognitive function, higher test scores, and fewer sick days. By targeting and removing harmful pollutants likeM2.5 and VOCs, IAQP supports a healthier environment for both students and staff. This means more consistent attendance, improved concentration, and a tangible impact on academic performance and well-being. Lower Capital Costs IAQP allows schools to meet ventilation standards without upsizing HVAC systems to handle excessive outdoor air requirements. This can result in substantial savings on new construction or renovation projects, as mechanical systems can be designed for lower capacity while still achieving compliance. For existing buildings, this approach often eliminates the need for expensive retrofits or system overhauls. Stronger School Reputation Through Sustainability and Wellness Adopting IAQP positions schools as forward-thinking leaders in health and environmental responsibility. By improving indoor air quality and reducing energy use, schools can actively contribute to sustainability and decarbonization goals, while also enhancing occupant wellness. These improvements support schools pursue certifications such as WELL and LEED—demonstrating a clear commitment to creating safe, healthy, and future-ready learning environments that attract families, staff, and community support. Who Else Is Making the Change? While IAQP adoption may not be making headlines, a growing number of schools, manufacturing facilities, and office buildings are making the switch. Facilities across the U.S. are using IAQP to modernize air quality strategies without the burden of overhauling mechanical systems, and are already seeing the benefits in energy savings, occupant wellness, and operational flexibility. These organizations may not always publicize their methods, but their results speak for themselves: measurable improvements in indoor air quality, reduced HVAC loads, and enhanced learning and working environments. As awareness grows and more case studies emerge, IAQP is quickly becoming a best-kept secret in smarter, more sustainable facility management. AirBox: A Trusted Partner in IAQP Implementation At AirBox, we understand that adopting IAQP can feel like uncharted territory. That’s why we offer end-to-end engineering support to help schools and other facilities evaluate, design, and deploy IAQP with confidence. We design our line of commercial-grade High-Volume Purifiers (HVPs) specifically to support IAQP compliance, offering verified filtration efficacy performance against key contaminants like PM2.5, VOCs, and airborne pathogens. AirBox also offers IAQP Verification Testing after implementation to verify the removal of ASHRAE Table 6-5 contaminants. Whether you're looking to retrofit an aging HVAC system or design a new facility with IAQP from the ground up, AirBox provides the tools, documentation, and guidance you need to meet standards and surpass expectations. Thinking about IAQP but not sure if it’s the right move? You’re not alone. Let’s talk about how schools are quietly making the switch and how AirBox can help you do the same, out loud and with confidence ...

The U.S. Green Building Council (USGBC) has introduced LEED Version 5, incorporating significant updates to enhance indoor air quality (IAQ) and promote sustainability. This latest version reflects a growing emphasis on performance-based outcomes, occupant health, and climate resilience. With changes aimed at aligning certification requirements with current building science and operational realities, LEED v5 marks a major step forward in the evolution of green building standards. Additionally, the updates focus not only on reducing environmental impact but also on ensuring that indoor spaces are healthier and more responsive to the needs of building occupants.     What’s New in LEED Version 5? The transition to LEED Version 5 signals a more advanced approach to addressing various environmental concerns, particularly those related to human health. The most notable addition to the proposed update is the incorporation of the latest indoor air quality standards set forth by ASHRAE. Specifically, LEED v5 allows the adoption of certain practices within ASHRAE Standard 62.1-2022 and ASHRAE Standard 241-2023 as earnable credits, which lays out comprehensive guidelines for maintaining healthy indoor environments.   Indoor Air Quality Procedure ASHRAE introduced a new Indoor Air Quality Procedure (IAQP) in Standard 62.1-2022, enabling building designers and operators to reduce outdoor air intake by incorporating air cleaning into ventilation design. This flexibility allows buildings to maintain healthier indoor environments without strictly following traditional, often outdated, ventilation requirements. By endorsing this standard, LEED Version 5 promotes practices that adapt to the dynamic nature of indoor air quality, enhancing overall occupant health and productivity. Indoor Air Quality Assessment Testing In addition to the earnable credits through the implementation of the IAQP, LEED Version 5 also includes specifications for indoor air quality testing outlined in ASHRAE Standard 62.1-2022. These requirements provide a detailed framework for evaluating the air quality within buildings, emphasizing the measurement of various contaminants, testing equipment calibration specifications, and the processes in which the testing must be performed. Air Cleaner Effectiveness Testing ASHRAE Standard 241-2023 lays out guidelines for prescriptive indoor air quality management when there is a heightened risk for infectious aerosol contamination, and for the first time, provides quantitative testing requirements for the effectiveness of air cleaning technology. When adding indoor air cleaning systems to ventilation design, LEED Version 5 will allow credits to be earned when such devices are tested for ASHRAE Standard 241-2023 and ASHRAE Standard 62.1-2022 requirements. By aligning with ASHRAE’s rigorous testing standards, the LEED Version 5 framework encourages the adoption of proven air cleaning technologies, empowering building owners and designers to make informed decisions that contribute to healthier indoor environments. Consequently, this initiative supports sustainability goals and fosters building resilience, promoting a guaranteed approach to environmental and public health in the built environment.   AirBox: Bringing Certification to Life AirBox is an asset for achieving LEED Version 5 certification. The AirBox IAQ Testing Services fully align with LEED's requirements for earning IAQ Testing credits, ensuring compliance with the latest standards. Additionally, AirBox High-Volume Purifiers (HVPs) play a critical role in meeting ASHRAE’s Indoor Air Quality Procedure (IAQP), which helps reduce energy consumption and supports the attainment of LEED credits for improved indoor air quality. With these integrated solutions, AirBox helps building projects achieve sustainability and occupant health goals, streamlining the path to LEED certification.   Conclusion LEED Version 5 represents a significant advancement in integrating IAQ and energy efficiency into building design. By adopting the IAQP and aligning with ASHRAE's latest standards, LEED Version 5 encourages the development of buildings that prioritize occupant health and environmental sustainability. Professionals in the building industry should familiarize themselves with these updates to ensure compliance and leverage the opportunities presented by this enhanced certification framework.   ...

[Charlotte, North Carolina] - [February 19th, 2025] - AirBox, a leading innovator in indoor air quality solutions, announced the groundbreaking launch of the Vortex 4000 HVP (High-Volume Purifier), the first-ever air purifier designed to provide for both ASHRAE Standard 241-2023 IRMM and ASHRAE Standard 62.1-2022's Indoor Air Quality Procedure applications, along with their entire line of HVPs. In response to growing market demands, this revolutionary unit delivers an unprecedented 4,000 CFM (cubic feet per minute) of clean air while prioritizing reduced energy consumption and indoor environmental responsibility. AirBox meticulously engineered the Vortex 4000 HVP to tackle large spaces and meet the growing demand for better indoor air quality. As a result, the AirBox HVPs are a game-changer in building purification and infection risk management. Key Features of the Vortex 4000 HVP Dual ASHRAE Compliance ASHRAE Standard 62.1-2022's Indoor Air Quality Procedure (IAQP) dictates minimum ventilation rates needed to ensure safe and healthy indoor air quality while effectively reducing energy consumption and promoting sustainability and decarbonization goals using recirculated purified air to minimize outdoor air intake. At normal operating fan speeds of up to 2,000 CFM, this High-Volume Purifier easily provides for those requirements. Furthermore, with the click of a button, it can produce massive amounts of clean air to meet ASHRAE Standard 241 requirements for Infection Risk Management Mode (IRMM). The Vortex 4000 HVP can double its airflow up to 4,000 CFM to minimize the risk of airborne viral transmission during times of heightened infectious risk. AirBox Advanced Operating System: Smarter, More Efficient Management The AirBox Advanced Operating System (AOS) connects through cellular or Wi-Fi to a cloud-based mobile and web dashboard with Building Management System integration options. This intuitive system allows facility managers to monitor, adjust, and schedule unit operations, effectively reducing maintenance time and costs. Additionally, the AOS displays live data from integrated differential pressure, TVOC, PM2.5, and CO2 sensors for indoor air quality metrics and to track filter efficiency and replacement timelines. In addition, users can set IRMM (Infection Risk Management Mode) fan speeds for all AirBox devices in the building for easy deployment of clean air for things like flu outbreaks, wildfires or outdoor pollution events making these products ideal for a building owner's Indoor Air Quality Risk Management Plan. Advanced Filtration for Cleaner Air AirBox designed the Vortex 4000 HVP with Advanced Molecular Adsorbent and Certified HEPA filtration, which effectively removes airborne pathogens, Volatile Organic Compounds (VOCs), allergens, and particulate matter from the indoor air. The unit is third-party tested and proven to remove all h armful contaminants, or Contaminants of Concern (COCs), listed in ASHRAE Standard 62.1-2022 Table 6-5, ensuring cleaner, healthier air in all indoor environments. Additionally, all AirBox HVP products are leak tested in accordance with IEST-RP-CC034.5 with Certification labeling. Adaptable Installation AirBox designed the Vortex 4000 HVP to integrate seamlessly into virtually any HVAC design. This versatile unit can function as a standalone air purifier, seamlessly integrate into existing ductwork, or be configured as a modular component within larger, more complex systems. Moreover, the availability of an outdoor version, featuring high-quality R12 foam insulation within double-wall construction, extends its application to rooftop installations and other exposed environments, ensuring consistent performance even in harsh conditions. This breadth of integration options allows HVAC designers ultimate flexibility to meet unique project requirements with ease. The Future of Commercial IAQ As building development accelerates and the importance of health-conscious design grows, indoor air quality, decarbonization, and sustainability have emerged as critical factors in building design and operations. The commercial industry is increasingly recognizing the paramount importance of indoor air quality (IAQ), driven by evolving standards and a greater awareness of the impact on occupant health, productivity, and overall well-being. With IAQ standards gaining traction globally, Dubai is a perfect example by taking a leading role by implementing stricter regulations, including ASHRAE Standards 241 and 62.1-2022. This proactive approach creates a demand for advanced IAQ solutions, and AirBox positioned the Vortex 4000 HVP to lead the charge, effectively addressing these stringent standards and ensuring cleaner, healthier indoor environments. AirBox: Innovating for a Healthier Sustainable Future With an unwavering commitment to innovation and compliance, AirBox continues to lead the way in indoor air quality technology. The Vortex 4000 HVP is a testament to AirBox's dedication to providing top-tier solutions that not only meet industry standards but also exceed the expectations of building owners and facility managers worldwide. About AirBox AirBox is an industry leader in contamination control and pathogen mitigation for commercial facilities and occupied spaces. AirBox has 35 years of experience in micro-contamination settings associated with semiconductor and life science process environments. Stemming from its background in cleanroom construction and performance certification, AirBox has expertise in building code standards, specializing in ventilation optimization, Indoor Air Quality Testing requirements that establish minimum regulatory requirements for acceptable indoor air quality, and leveraging the latest International Mechanical Code (IMC) and ASHRAE Standards for its clients. The Vortex 4000 HVP is now available for purchase. AirBox invites interested parties to learn more about the product by visiting the website or contacting one of our experts ...

As building development accelerates and the importance of health-conscious design grows, indoor air quality (IAQ), decarbonization, and sustainability have emerged as critical factors in building design and operations. The Indoor Air Quality Procedure (IAQP) has gained significant traction worldwide, offering a framework for achieving better indoor environments. A notable example of this trend is Dubai's recent adoption of ASHRAE Standard 62.1-2022 and ASHRAE Standard 241-2023 for both retrofit and new construction design, which provide guidelines for IAQ in commercial buildings. In November of 2024, the Ministry of Energy and Infrastructure (MoEI) announced the adoption of the latest technical specifications from the American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE) to enhance indoor air quality and achieve energy goals in government buildings across the UAE. This article explores the positive implications of these adoptions, the role of IAQP, and the global movement towards improved indoor air quality standards. Understanding IAQP and ASHRAE Standard 241-2023 What is IAQP? The Indoor Air Quality Procedure is a new performance-based ventilation design provided in ASHRAE Standard 62.1-2022, which aims to ensure immense decarbonization and energy savings using recirculated cleaned indoor air. Rather than strictly adhering to prescriptive ventilation rates, IAQP allows for flexibility based on specific needs of a space and its occupants. This procedure considers various factors, including the building's use, occupancy levels, and the nature of the indoor environment, enabling a more tailored and effective strategy for maintaining an acceptable breathing zone. What is ASHRAE Standard 241-2023? ASHRAE Standard 241 - Control of Infectious Aerosols provides requirements aimed at mitigating the transmission of airborne infectious contaminants in indoor environments. Developed by ASHRAE at the request of the White House, this standard establishes minimum requirements aimed at reducing the risk of disease transmission through exposure to infectious aerosols. It outlines strategies for designing and operating HVAC systems to enhance indoor air quality, including recommendations for the use of high-efficiency filters, effective air distribution methods, and the incorporation of proven air cleaning technologies. Key highlights include:   Infection Risk Management Mode: As one of the mitigation techniques listed, this mode applies during identified times of elevated airborne disease transmission risk, utilizing compliant air filtration systems for enhanced air output. Filtration and Air Cleaning Requirements: This standard outlines filtration and air cleaning effectiveness testing requirements. Subtractive technologies utilizing mechanical fibrous filtration, such as HEPA filters, and additive technologies that inactivate aerosols and particles, such as UV (ultraviolet) and bipolar ionization, should meet the test requirements to establish effectiveness and safety (inclusive of chemical analyte byproducts generation). By integrating these standards into building codes and regulations, cities and nations are working to create healthier environments for occupants. Dubai's Commitment to IAQ Why Dubai? Known for its rapid development and innovation, Dubai's embrace of IAQP and ASHRAE Standard 241 solidifies its commitment to sustainability and public health. This initiative aims to improve public health by controlling airborne infectious agents and ensuring that indoor spaces are safe and healthy. The new standards will play a vital role in making infrastructure projects more resilient to airborne pollutants, with a focus on energy efficiency and occupant well-being. Implications of the Adoptions Improved Health Outcomes: By adhering to these standards, Dubai will create spaces that enhance occupant health and well-being. Improved indoor air quality can reduce respiratory issues, allergies, and other health problems linked to poor indoor environments, ultimately reducing absenteeism and increasing cognitive function. Sustainability and Decarbonization Goals: Dubai is on a mission to become one of the world's leading sustainable cities. The implementation of IAQP supports this goal by reducing outdoor air intake, in-turn reducing energy consumption while ensuring adequate ventilation and air quality. Operational Resilience: A commitment to high standards of IAQ mitigates disruptions to operations caused by infectious outbreaks or outdoor air pollution events, positioning Dubai as a pioneer in building safety and resilience. Global Leadership: By adopting leading international standards like ASHRAE Standard 62.1-2022 and ASHRAE Standard 241-2023, Dubai positions itself as a global leader in building safety and sustainability. The MoEI reaffirmed its commitment to implementing these standards nationwide, positioning the UAE as a leader in sustainable infrastructure development and public health initiatives. Global Trends in IAQP Adoption Dubai is not alone in this movement; cities worldwide are increasingly recognizing the significance of improved indoor air quality and decarbonization. Key trends include: Regulatory Changes: Many states are publishing legislation aimed at improving indoor air quality in facilities. Other organizations, such as the International Mechanical Code (IMC) and the United States Green Building Council (USGBC), are adding IAQP language into building standards and environmental credits. Growing Awareness: As individuals and organizations become more informed about the impact of indoor air quality, there is a collective shift toward prioritizing clean air and sustainable solutions. This heightened consciousness ultimately leads to policymakers adopting performance-based ventilation practices and investing in innovative technologies. Technological Advancements: New building standards have encouraged innovations in HVAC technology, indoor air quality testing, and building management systems to facilitate the effective implementation of IAQP and ASHRAE Standard 241. The Future of Building Standards The adoption of ASHRAE Standard 62.1-2022 and ASHRAE Standard 241 in Dubai is a pivotal step in the global movement towards improved indoor air quality and decarbonization. As cities continue to face challenges related to public health and environmental sustainability, the new performance-based ventilation design provides a viable solution that combines flexibility, performance, and health considerations. With Dubai leading the way, the trend toward prioritizing IAQ is set to gain even more traction worldwide, ultimately fostering healthier and more sustainable living and working environments for all. As more cities recognize the importance of indoor air quality and adopt standards like ASHRAE Standard 62.1-2022 and ASHRAE Standard 241, a healthier future for the built environment becomes increasingly attainable. Get Started AirBox can assist your design team in implementing the Indoor Air Quality Procedure or ASHRAE Standard 241 whether it's for retrofit or new construction. Our team of experts specializes in leveraging the newest ventilation and indoor air quality standards for our clients. We offer a comprehensive, turnkey solution for IAQP, providing everything from design assistance and feasibility calculations to solutions and verification testing. Reach out to our team to get started on feasibility calculations and projected ROI for your performance-based ventilation design (IAQP) ...