Smoke-season planning tool
Smoke CADR room-size helper
Estimate the minimum tobacco smoke CADR to look for when sizing a portable air cleaner for wildfire-smoke fine particles. This is a practical shopping aid, not medical advice.
Editable estimate
Smoke CADR room-size helper
Health Canada says, as a general guideline, a portable air cleaner's tobacco smoke CADR should be at least two-thirds of the room area. Device room ratings usually assume an 8-foot ceiling, so this helper adjusts upward for taller rooms.
Planning result
80 CADR
Minimum tobacco smoke CADR estimate for a 120 sq. ft. room. Ceiling-adjusted planning area: 120 sq. ft.
This is not a health guarantee. During smoke events, follow local air-quality guidance, keep doors and windows closed when appropriate, and follow manufacturer instructions.