Indoor air is often more polluted than outdoor air, and we spend ~90% of our time in it. Here's the beginner's map of what's in your air and what to do.
Our recommendation
CleanAirKits Luggable XL Ultra (7-Fan)
681 m³/h CADR, MERV-13, under 35 dB — powerful whole-home clean air — no proprietary lock-in, ships from the UK.
Check price →Use code CORSI10 for 10% off at checkout.The main pollutants
- Particles (PM2.5) — cooking, traffic, smoke, pets, pollen.
- VOCs & odours — paint, furniture, cleaning products.
- CO2 — from people in under-ventilated rooms.
- Humidity — damp breeds mould; very dry air irritates.
Measure it
Fix it
Ventilate for CO2 and humidity; filter for particles. A CR box handles the particle load; add carbon for VOCs. It's the same logic a bought kit uses.