Levoit LAP-C311S
Room air purifier · suggested up to 271 sq ft · True HEPA (H13)
A room air purifier rated to clear 175 CFM of smoke-sized particles — enough for a room up to about 271 sq ft.
Buy this purifier
No verified retail listingwe only link a listing we matched to this exact AHAM-certified model
Levoit LAP-C311S room air purifier
Search the model number above at your usual retailer, then check what you find against the certified AHAM figures on this page.
Closest model we can link on Amazon: the Levoit LAP-V102S-WUS (Vital 100S-P). It is a different purifier: smoke CADR 143 vs 175 for this one, rated for rooms up to 222 sq ft.
See the Levoit LAP-V102S-WUS (Vital 100S-P) on Amazon →Affiliate link. We may earn a commission at no cost to you.
At a glance
Who it's for
A typical bedroom or living room that needs cleaner air.
The standout number
Smoke CADR of 175 — the number that decides how fast it clears wildfire smoke and fine particles.
The catch
AHAM's record lists no carbon stage. If odors or smoke smell matter, check the listing for a carbon filter before you buy.
The Verified Label — every AHAM-tested spec
ENERGY STAR listed
US market
Clean Air Delivery Rate (CADR) — source: AHAM
Coverage & power — source: AHAM (+ computed)
Filter & identity
How it ranks
Where this unit sits among the 235 room air purifiers we track, on the two numbers that decide one: how fast it clears fine smoke particles, and how big a room it covers. Percentiles are computed from our corpus (higher = better).
Smoke CADR
Better than 65%
of the 235 units with a published smoke CADR
Suggested room size
Better than 65%
of the 235 units with a published room size
Compare similar air purifiers
Every certified version of this unit
AHAM certifies each colourway and region separately, so this machine holds 3 certificates. They are the same purifier — identical CADR — sold under different SKUs. Each row is linkable.
| Certified model | Dust | Smoke | Pollen | Room |
|---|---|---|---|---|
| LAP-C311Sthis page | 175 | 175 | 200 | 271 sq ft |
| LAP-C311S-WCAR | 175 | 175 | 200 | 271 sq ft |
| LAP-C311S-WUSR | 175 | 175 | 200 | 271 sq ft |
Frequently asked questions
How big a room does the Levoit LAP-C311S cover?
AHAM suggests it for a room up to 271 square feet. That rating assumes it runs on high and cleans the air about 4.8 times an hour. For faster cleaning — say for wildfire smoke or allergies — size it to a smaller room than the maximum.
What is the CADR of the Levoit LAP-C311S?
Its AHAM Clean Air Delivery Rate is 175 for dust, 175 for smoke and 200 for pollen, with a PM2.5 CADR of 176. CADR is cubic feet of clean air delivered per minute — higher clears a room faster.
Does the Levoit LAP-C311S use a real HEPA filter?
Its filter is listed as True HEPA (H13). True HEPA captures 99.97% of particles down to 0.3 microns.
How much power does the Levoit LAP-C311S use?
About 22.5 watts on its smoke-clearing setting, which works out to 7.8 CADR per watt — a measure of how much clean air you get for the electricity it draws. It is ENERGY STAR certified.
Where can I buy the Levoit LAP-C311S?
We haven't matched a retail listing to this exact AHAM-certified model, so we don't link one — AHAM model numbers often differ from the name a retailer sells it under. Search the model number above at your usual retailer and check what you find against the certified figures on this page. The replacement filters are the recurring cost — check those before you commit to a brand.
Sources. Clean Air Delivery Rate (dust / smoke / pollen), PM2.5 CADR, suggested room size, ENERGY STAR status and power draw come from the AHAM Verifide air-cleaner directory (the industry's independent CADR test). Average CADR, clean-air-per-watt and the percentile figures are computed by Verified HVAC Data from those published ratings. We publish no star ratings and take no payment for placement. "Not published" means AHAM's record doesn't disclose it — we never fill a spec with a guess.