Air purifier prices tell you nothing on their own. What matters is CADR, the industry-standard Clean Air Delivery Rate, and how much of it you get for your money. This ranks every popular model by cost per CADR, so the real value winners rise to the top. Filter by your room size to see only what will actually clear the air.
Prices and specs reviewed 11 July 2026. Check the live listing, and remember to factor in ongoing filter costs.
| Air purifier | CADR | Room | Filter | Noise | Price | $/CADR |
|---|
Clean Air Delivery Rate, in cubic feet per minute (CFM). The AHAM standard for how much filtered air a purifier delivers, higher means it cleans faster. Cost per CADR shows how much performance you get per dollar.
The two-thirds rule: CADR in CFM should be at least two-thirds of your room area in sq ft. A 300 sq ft room wants around 200 CFM. Allergy sufferers should size up. Filter by room size to see suitable models.
Yes. True HEPA or H13 captures 99.97% of particles to 0.3 microns, dust, pollen, dander, smoke. Avoid weaker HEPA-type filters. The filter grade is shown for each model.
Usually not. Some premium units cost several times more per unit of clean air than proven mid-range models. Sort by cost per CADR to see the real winners, and check filter running costs too.