3 Pages • Free A4 PDF
Buyer's guide
The Clean Air CADR & Purifier Guide
How to size a HEPA air cleaner with the two-thirds CADR rule, the MERV filter ladder for HVAC, the ozone and ioniser warning, and a room-by-room sizing worksheet.
The Complete Daily System
Healthy Home Air Quality Audit (28 Pages)
Room-by-room inspection walkthrough, moisture and ventilation checklist, and wildfire smoke emergency guide.