- COVID/Long COVID
Understanding COVID-19
Vaccines & Research
Prevent & Respond
Masks & Respirators
- Clean Air
Resources
Air Quality Index
Check your local AQI
CADR Calculator
Find your ideal Air Exchange Rate
Filter Guide
From MERV to HEPA - what does it all mean?
DIY Air Purifiers and Impacts
Overview
How to Build your own DIY Air Purifier for Cleaner Air.
- Projects
We have a number of other projects in process and intend to publish soon involving educational toolkits for schools, community centers, repurposable widgets, and others.Â
All of our projects are open-source, open-data, and open-science. Check back at our github for updates.
- About
Public Transparency & Info
- News
Upcoming Events
24 Sep, 2026Healthy Indoor Air in Schools: Every Breath Shapes Learning
A morning program from Air Club focused on healthy indoor air in schools.405 E 45th St New York, NY 10017 United States29 Sep, 2026WELL 2026 Healthy Building Policy Summit: Washington D.C.
A WELL 2026 thematic summit focused on healthy building policy.Washington, DC United States + Google Map - Merch
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- COVID/Long COVID
Understanding COVID-19
Vaccines & Research
Prevent & Respond
Masks & Respirators
- Clean Air
Resources
Air Quality Index
Check your local AQI
CADR Calculator
Find your ideal Air Exchange Rate
Filter Guide
From MERV to HEPA - what does it all mean?
DIY Air Purifiers and Impacts
Overview
How to Build your own DIY Air Purifier for Cleaner Air.
- Projects
We have a number of other projects in process and intend to publish soon involving educational toolkits for schools, community centers, repurposable widgets, and others.Â
All of our projects are open-source, open-data, and open-science. Check back at our github for updates.
- About
Public Transparency & Info
Press and PSAs
- News
Upcoming Events
24 Sep, 2026Healthy Indoor Air in Schools: Every Breath Shapes Learning
A morning program from Air Club focused on healthy indoor air in schools.405 E 45th St New York, NY 10017 United States29 Sep, 2026WELL 2026 Healthy Building Policy Summit: Washington D.C.
A WELL 2026 thematic summit focused on healthy building policy.Washington, DC United States + Google Map - Merch
