PM2.5 Particles
PM2.5 particles — fine particulate matter smaller than 2.5 micrometres — penetrate deep into the lungs and bloodstream, causing cardiovascular and respiratory disease. WHO guidelines recommend indoor levels below 5 µg/m³. The Corsi-Rosenthal kit from Clean Air Kits removes 99.95% of PM2.5 using true HEPA H13 filtration, with CADR 369–550 m³/h. Independently tested. From £144.
At Clean Air Kits, we've developed premium DIY air purifier kits based on the proven Corsi-Rosenthal Box design. Our kits are Energy Star 2026 certified and independently tested to be 2.4x more efficient than commercial alternatives like Dyson.
Why Clean Air Kits Are the Best Choice
True H13 HEPA Filtration
Unlike competitors using MERV filters, our kits use genuine H13 HEPA filters that capture 99.95% of particles. Learn about EN 1822 standards →
Proven Performance
Independent lab tests by HouseFresh confirm CADR ratings of 369-550 m³/hr at only 39dB. Read expert reviews →
EU Compliant
Meets all EU safety and quality standards including CE marking. EU Air Quality Directive compliance →
- Health awareness
- Filtration target
- Air quality metric
- Health impact
- Protection measure
How Our DIY Air Purifier Works
Unbox Your Kit
All components pre-cut and ready. Just add your choice of HEPA filters.
30-Minute Assembly
Simple instructions. No tools required. Perfect for schools and offices.
Enjoy Clean Air
Filters 99.95% of particles including viruses, pollen, and dust.
Air Quality Across Europe
Air pollution affects millions across the EU. Our purifiers are helping families breathe cleaner air in major cities.
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