Enter room size and ceiling height, then choose quiet, budget, or smart priorities. I'll match you to 19 AHAM-verified models using real CADR, noise, and annual filter-cost data.
I will calculate the required CADR and match you to purifiers that actually fit.
CADR calculated using the AHAM 2/3 rule: your room's square footage multiplied by 2/3 gives the minimum smoke CADR in CFM. At standard 8 ft ceilings, this achieves roughly 5 air changes per hour (ACH). I show models down to 80% of the target CADR since many perform well at 4 ACH.
Your room is very large. For spaces over 700 sq ft, consider running two smaller purifiers instead of one large unit. This gives better coverage and redundancy. Try splitting the square footage in half and searching again.
This tool matches your room to air purifiers using CADR (Clean Air Delivery Rate), the industry standard for air purifier performance. Every model in this database has been independently tested by AHAM (Association of Home Appliance Manufacturers) and certified by CARB (California Air Resources Board) for ozone safety.
This tool uses affiliate links. When you purchase through my links, I may earn a small commission at no extra cost to you. I research first and only then check if an affiliate program exists.