13 Nov, 2026
How to size an air purifier for a room with a vaulted or high ceiling: the volume-based CADR formula, plus worked examples for a bedroom and great room.
Size a garage or workshop air purifier by square footage, then match the filter to sawdust (HEPA) or paint and solvent fumes (HEPA plus carbon).
Size an air purifier for a home office under 150 sq ft, built for all-day use, paper dust, and printer and copier VOCs, plus a desk-placement diagram.
Match your kitchen air purifier to its square footage with this smoke-CADR sizing table, and learn why HEPA alone cannot remove cooking odors and VOCs.
One correctly sized air purifier covers most open floor plans up to 600 sq ft. See the CADR math, a sizing table, and when two units work better.