TLDR

• New research shows harmful chemicals from refrigerants are building up indoors, making air quality a health and legal concern, not just a comfort issue.
• Upgrading to MERV 13 filters, adding balanced ventilation, and monitoring air quality with sensors are key steps for homeowners, contractors, and property managers.
• New rules require better documentation and use of low-impact refrigerants by 2027, driving demand for IAQ-focused products and services.

New research reveals that some persistent chemicals, including organofluorine compounds like trifluoroacetic acid (TFA), are building up inside homes and buildings. These substances come from refrigerants and settle in water and on surfaces, raising concerns beyond air comfort. Indoor air quality is becoming a legal and financial priority for homeowners, contractors, and property managers alike. Upgrading to higher-rated filters, improving ventilation, and using sensors to monitor air quality are now essential steps to reduce risks and comply with evolving regulations.

Compliance watch: IAQ moves into rules and risk

Indoor air quality (IAQ) is becoming a key part of building rules and risk management. Expect more documentation showing ventilation rates, filter ratings, and maintenance logs. These records prove that proper care is taken to keep air clean. In the European Union, new HVAC systems must use refrigerants with a Global Warming Potential (GWP) under 150 starting in 2027. GWP measures how much a gas warms the planet compared to carbon dioxide. Using lower-GWP refrigerants also reduces some harmful chemicals indoors. Contractors and property managers will see requests for proposals (RFPs) that include clear IAQ targets. These targets cover airflow levels, filter types like MERV ratings, and controlling pollution sources. Ongoing data collection and reporting will be required to meet these standards. IAQ is no longer optional—it is part of compliance and risk management for homes and buildings.

Demand signals for filters, ventilation, and sensors

Homeowners are looking for long-lasting solutions that add real value. They prefer MERV 13 media cabinets, which hold higher-grade filters designed to capture fine particles. Quiet energy recovery ventilators (ERVs) that bring fresh air without wasting heat are also in demand. Simple indoor air quality alerts help homeowners stay informed without hassle. Contractors see a growing chance to offer good–better–best IAQ packages. These bundles combine media cabinets, ERV or heat recovery ventilators (HRVs), and air quality monitors. Adding service plans and proof-of-performance reports makes these offers more attractive. Meanwhile, refrigerant leaks from heat pumps have come under scrutiny. One study linked these leaks to 212,000 tonnes of CO₂ equivalent emissions. This focus will lead to stricter leak tests and better recovery practices. Contractors providing IAQ-focused services will benefit as demand for improved ventilation and filtration grows.

Practical IAQ playbook: filter, ventilate, verify

Start with filtration by choosing MERV 13 filters. These capture fine particles like PM2.5, which are tiny dust and pollution particles that can harm health. Before upgrading, have a professional check your system’s static pressure, which is the resistance airflow faces. Deep media cabinets help lower this pressure, keeping airflow strong and efficient.



Next, focus on ventilation. Balanced systems like ERVs (energy recovery ventilators) or HRVs (heat recovery ventilators) bring in fresh air while recovering heat. These systems maintain airflow that meets building codes. A professional should size, wire, and commission your ventilation to ensure it works correctly.



Finally, add sensing devices. Place monitors for CO2 (to detect crowding), PM2.5 (fine dust), and VOCs (volatile organic compounds, or chemical fumes) in main rooms. Logging this data helps track indoor air quality over time. Linking alerts to your thermostat or building system lets you respond quickly to changes in air quality.

What to do next: steps for each reader

Homeowners should upgrade to MERV 13 filters if their system's blower can handle the extra airflow resistance. Adding a HEPA unit in the bedroom can further reduce airborne particles. Consulting a professional about installing an Energy Recovery Ventilator (ERV) helps bring in fresh air efficiently. Contractors can create IAQ bundles that combine media cabinets, ERVs or HRVs, and air quality monitors. These packages should have clear specifications and be easy to install. Including maintenance plans and proof-of-performance reports adds value and builds trust. Property managers need to set clear indoor air quality targets and establish regular service intervals. Tracking and reporting IAQ data ensures compliance and reduces liability. Planning upgrades during unit turnovers spreads costs and minimizes disruption. Each group can take practical steps to improve indoor air quality while meeting new regulations and customer expectations.

Key Takeaways

• Indoor air quality is now a key compliance and liability issue, not just a comfort feature. Facilities and homes must meet stricter ventilation and filtration standards to reduce risk and meet regulations.
• Persistent chemicals like organofluorines from refrigerants build up indoors on surfaces and in water. This means upgrading filters and improving ventilation is essential for healthier air.
• Using MERV 13 filters captures fine particles (PM2.5) effectively. Balanced ventilation systems with energy recovery ventilators (ERVs) bring fresh air while saving energy, improving indoor air quality efficiently.
• Monitoring indoor air with CO2, PM2.5, and VOC sensors helps track air quality in real time. Regular maintenance and data logging prove compliance and support better air management decisions.

Frequently Asked Questions

What new chemicals have recent studies found indoors, and why does this matter?

Recent research detected organofluorines like TFA, a persistent acid from some refrigerants, accumulating indoors on water and surfaces. This matters because these chemicals impact indoor air quality, which is now a key factor for comfort, health, and legal compliance in buildings.

How is indoor air quality becoming a regulatory concern?

Indoor air quality is shifting from being just about comfort to a compliance and liability issue. Facilities must now document ventilation rates, filter quality, and maintenance to meet stricter rules and avoid legal risks.

What practical steps can homeowners take to improve indoor air quality?

Homeowners should upgrade to MERV 13 filters, which capture fine particles, add balanced ventilation systems like energy recovery ventilators (ERVs), and use monitors for carbon dioxide, dust (PM2.5), and chemical fumes (VOCs) to track air quality.

How are contractors and property managers affected by these indoor air quality changes?

Contractors face growing demand for IAQ-rated equipment and complete service plans, including maintenance and performance reports. Property managers need to set IAQ targets, schedule regular servicing, and provide ongoing documentation to comply with new standards.

Related Topics: indoor air quality, chemical buildup, HVAC maintenance, home comfort, air filtration, ventilation systems, HVAC filters, energy efficiency, air quality compliance, HVAC parts, heating systems, air conditioning