Indoor Air Quality Policy Is Going Global: What Building Owners Should Prepare For

For most of the last century, indoor air sat in a regulatory blind spot. Outdoor air had ambient standards, monitoring networks, and enforcement. Indoor air, where people spend most of their lives, was governed mainly by ventilation codes written to control odor and comfort. That is changing quickly. A July 2026 report from the International WELL Building Institute, the Brown University Pandemic Center, and Air Club catalogued 158 adopted indoor air quality (IAQ) policies in 40 countries and found that 51 of them, in 27 countries, were enacted or amended between 2021 and 2026.

For architects, engineers, and building owners, the question is no longer whether IAQ regulation is coming, but what form it will take. Some governments publish indoor air data, others write IAQ into energy codes, and a few enforce limits with fines. This article looks at what these approaches share and what they mean in practice.

Why Indoor Air Policy Has Accelerated

The pandemic made ventilation a public topic, but the policy momentum has outlasted it. Indoor air connects several government priorities at once: infection control, children's learning, worker productivity, energy efficiency, and resilience during smoke and dust events. Low-cost CO₂ and particle sensors have also made indoor air measurable at a scale that was not practical a decade ago, which makes regulation easier to design. Our earlier article on the accuracy of low-cost indoor air quality sensors explains why that measurement layer still needs care.

Five Policy Models, From Funding to Enforcement

The July 2026 report groups the most advanced policies into five models. Each one asks something different of building owners.

Targeting high-priority buildings. Boston and the United Kingdom have focused resources on schools. Boston Public Schools installed about 4,400 IAQ sensors across more than 120 schools, with public dashboard data and a response plan tied to pollutant thresholds. In England, the Department for Education supplied CO₂ monitors to all state-funded education and childcare settings between 2021 and 2023. Its February 2026 guidance treats readings under 800 ppm as good ventilation, 800–1,500 ppm as adequate, and over 1,500 ppm as poor.

Transparency and labeling. Belgium's law of 6 November 2022 on indoor air quality in closed spaces accessible to the public creates two reference levels: Level A, below 900 ppm CO₂ (or at least 40 m³/h per person of ventilation and purification, including 25 m³/h of outdoor air), and Level B, below 1,200 ppm (or at least 25 m³/h per person of outdoor air). The framework envisions CO₂ meters, a risk analysis and action plan, and a certificate displayed to the public. Belgium's health ministry notes that the practical obligations depend on implementing royal decrees, and the report describes a gradual move from voluntary to mandatory measures starting in 2027.

Writing health into building performance rules. The European Union's recast Energy Performance of Buildings Directive (EU) 2024/1275 is the clearest example. It defines indoor environmental quality as an assessment of indoor conditions that affect occupants' health and well-being, requires Member States to set requirements for adequate IEQ standards, calls for IAQ monitoring and control devices in new non-residential zero-emission buildings, and requires building automation systems in larger non-residential buildings to be able to monitor IEQ. In the Middle East, the UAE Ministry of Energy and Infrastructure announced in November 2024 that it would apply ASHRAE Standards 62.1-2022 and 241 to new and existing federal government buildings, reporting a 35% reduction in mechanical ventilation energy at its first pilot, the Daba Fujairah Court and Prosecution building. Readers interested in the wider Emirati context can see our post on the UAE's leadership in green building and wellness design.

National coordination. Finland's Indoor Air and Health Programme (2018–2028), coordinated by the Finnish Institute for Health and Welfare, treats indoor air as a public health program rather than a building code issue. It links information for the public, building management, support for people with indoor-related symptoms, and professional training. Finland's long attention to school buildings is discussed in our article on indoor environmental quality in Finnish schools.

Dedicated IAQ laws with enforcement. South Korea and Taiwan have stand-alone IAQ laws with pollutant standards, monitoring duties for designated facilities, inspections, and penalties. These are the strictest models, and they show what a mature regime looks like: limits that apply to specific building types, routine measurement, and consequences when limits are exceeded.

What the Models Have in Common

Read side by side, the policies point in a consistent direction, even though they use different tools.

First, CO₂ has become the common currency. It is not a pollutant at typical indoor levels, but it is an inexpensive proxy for how much outdoor air each occupant receives. England uses 800 and 1,500 ppm as its bands; Belgium uses 900 and 1,200 ppm. The numbers differ, but in both cases the reference point is a measured reading in an occupied room, not a design airflow on paper.

Second, measurement is moving from optional to expected. Boston's dashboards, Belgium's meters and labels, and the EU's IEQ monitoring requirements all assume that buildings will produce data. A building that cannot show its indoor air conditions will increasingly be at a disadvantage in procurement, leasing, and compliance.

Third, IAQ and energy are being regulated together. The EU and UAE approaches tie ventilation and filtration to energy performance rather than treating them as competing goals. This is where good engineering pays off: demand-controlled ventilation, energy recovery, and efficient filtration allow better air without proportionally higher energy use.

Finally, schools and public buildings lead. Almost every model begins with buildings where occupants have little choice about where they spend their day.

How to Prepare a Building Now

Regardless of jurisdiction, several steps make a building ready for any of these models. Establish a measurement baseline with calibrated CO₂ and PM2.5 sensors in representative occupied spaces. Compare the results with recognized reference levels, such as the English and Belgian CO₂ bands, and document where ventilation falls short. Check whether the building automation system can log and report IEQ data, since that capability is becoming a requirement in Europe. Prepare a short IAQ management plan that sets out who responds when readings exceed thresholds and what they do. For new projects, set IEQ targets during pre-design studies rather than retrofitting monitoring later, and use a structured post-occupancy evaluation to confirm that the building performs as designed.

The Next Step: A Whole-Building IEQ Standard?

Standards bodies are moving too. ASHRAE has issued a request for proposals to develop BSR/ASHRAE Standard 235P, "Standard for Indoor Environmental Quality (IEQ) in Buildings," intended to provide a comprehensive framework for evaluating and supporting acceptable IEQ. The standard is at an early stage, and its content and timing are not yet known. If it develops as described, it could give regulators a ready-made technical reference and broaden policy from air alone to thermal, lighting, and acoustic conditions as well.

Conclusion

Indoor air policy is no longer a niche topic. Across Europe, the Middle East, North America, and East Asia, governments are funding monitoring, publishing data, writing IEQ into energy rules, and in some places enforcing limits. The common thread is measured performance in occupied buildings. Owners who start measuring, documenting, and managing indoor air now will be ahead of whichever model reaches their market next. If you would like help assessing your building against emerging IAQ requirements, contact SYNKTECT.

References

Ananthasekar, S., Hartke, J., Lagoudas, G., & King, B. (2026). Advancing healthy indoor air: Five leading policy models from around the world. Brown University Pandemic Center, International WELL Building Institute, and Air Club. https://a.storyblok.com/f/52232/x/782d2ef70e/for-release-policy-models-to-advance-healthy-indoor-air.pdf

ASHRAE. (2026). Request for proposals: Development of ASHRAE Standard 235P, Standard for Indoor Environmental Quality (IEQ) in Buildings. https://www.ashrae.org/about/request-for-proposals-development-of-ashrae-standard-235p

Department for Education. (2026, February 24). Ventilation and air quality in education and childcare settings. GOV.UK. https://www.gov.uk/government/publications/ventilation-and-air-quality-in-education-and-childcare-settings/ventilation-and-air-quality-in-education-and-childcare-settings

European Parliament and Council of the European Union. (2024). Directive (EU) 2024/1275 of 24 April 2024 on the energy performance of buildings (recast). Official Journal of the European Union. https://eur-lex.europa.eu/eli/dir/2024/1275/oj

Federal Public Service Health, Food Chain Safety and Environment (Belgium). (n.d.). A closer look at the legal framework for indoor air quality. https://www.health.belgium.be/en/closer-legal-framework-indoor-air-quality

Finnish Institute of Occupational Health. (n.d.). The Finnish Indoor Air and Health Programme. https://www.ttl.fi/en/research/projects/the-finnish-indoor-air-and-health-programme

UAE Ministry of Energy and Infrastructure. (2024, November 12). Ministry of Energy and Infrastructure enhances project sustainability by adopting new global air quality standards. https://moei.gov.ae/en/media-center/news/12/11/2024/ministry-of-energy-and-infrastructure-enhances-project-sustainability-by-adopting-new-global-air

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