Air Purifiers
The right air purifier starts with the room you need to treat. Compare the official performance and operating fields below before checking filters or extra features.
What matters when choosing
Room coverage and air delivery
Compare the clean air delivery rate with the room size instead of relying on a vague coverage claim. Use the CADR (cfm) for smoke, dust and pollen and the room size (sq ft) from the ENERGY STAR listing.
Filter
Look at the filter configuration listed for the exact model. Use the filter type from the ENERGY STAR listing.
Energy use
Review the energy record that applies to your use. Use the annual energy use (kWh/year) and the ENERGY STAR certification date from the listing.
Controls
Confirm that the controls fit the way you will run the unit. Use the automatic mode and connected capability from the listing.
Skip this category if
- You only need temporary odor control and do not want a recurring filter replacement plan.
- The space requires commercial-grade air handling rather than a residential room purifier.
Guides and comparisons
-
Buying guideChoosing an Air Purifier: Room Size, CADR and Energy Use -
Buying guideAir Purifier Filters: What HEPA Means and When to Replace Them -
ComparisonLevoit, Winix or Coway? Matching Each Brand to a Room -
By your situationAir Purifiers in a Pet Home: What the Data Can and Cannot Tell You
Shortlists by use
Each list applies one stated rule to the official ENERGY STAR data (216 certified air purifiers in our data, updated 2026-11-06).
- Air Purifiers with No Reported Ozone 173 models
- Air Purifiers with Wi-Fi 63 models
- Air Purifiers for 200 Sq Ft Rooms 148 models
- Air Purifiers for 300 Sq Ft Rooms 96 models
- Air Purifiers for 400 Sq Ft Rooms 67 models
- Air Purifiers for 500 Sq Ft Rooms 37 models
- Air Purifiers for 800 Sq Ft Rooms 4 models
- Air Purifiers for Small Rooms (Up to 150 Sq Ft) 47 models
- Air Purifiers Listed with a HEPA Filter 20 models
- Air Purifiers with an Air Quality Sensor 76 models
- Air Purifiers with a Timer 44 models
- Wi-Fi Air Purifiers with an Air Quality Sensor 27 models
- HEPA Air Purifiers with No Reported Ozone 16 models
- Low-Energy Air Purifiers (100 kWh/Year or Less) 57 models
- Energy-Efficient Air Purifiers 45 models
- ENERGY STAR Most Efficient Air Purifiers 66 models
Tool
Room size calculator for air purifiers — official sizing tables with a list of matching models.
Model data pages
Common questions
What size air purifier do I need for my room?
Start with the manufacturer’s room-size recommendation, then compare that range with the room where the unit will sit. Use the room size on the ENERGY STAR listing as a starting point, not a promise, and leave the required clearance around the intake and outlet.
How often should I replace a HEPA filter?
Check the manufacturer’s replacement interval and availability for the exact filter model. Set a reminder based on how much you run the unit and replace the filter as directed.
We compile and compare published data; we do not run our own product tests. See How We Compare.