Match an air purifier CADR to your room before you buy.

Enter room size and concern. CADR Match filters AHAM Verifide room-air-cleaner rows and shows models that meet the required smoke CADR target.

Room square feet Ceiling height Concern

Required smoke CADR200

Target air changes5 ACH

AHAM 2/3 check200

Air purifier CADR calculator in a furnished room

Top matching AHAM Verifide models

Model	Smoke CADR	AHAM room	CARB	Cost/CADR

Common room sizes

100 sq ft Smoke CADR 67 150 sq ft Smoke CADR 100 200 sq ft Smoke CADR 134 250 sq ft Smoke CADR 167 300 sq ft Smoke CADR 200 400 sq ft Smoke CADR 267 500 sq ft Smoke CADR 334 600 sq ft Smoke CADR 400 800 sq ft Smoke CADR 534 1000 sq ft Smoke CADR 667 1200 sq ft Smoke CADR 800 1500 sq ft Smoke CADR 1000

Formula

Required smoke CADR = sqft x ceiling height x ACH / 60
300 x 8 x 5 / 60 = 200
AHAM 2/3 room-size cross-check: CADR >= 200

Concern ACH defaults: smoke 5, allergies 4, dust 3. The site uses smoke CADR as the comparable rating because smoke CADR is commonly listed in AHAM rows.