Air purifiers up to 200 sq ft
Every AHAM-certified purifier whose tested coverage lands in this range, ranked on smoke CADR — with what each one costs to run continuously, which is how they are actually used.
Data current as of October 23, 2026 · 62 certified units · source AHRI + ENERGY STAR
What it costs to leave running
A purifier only works while it is on, so most people leave it on — and across the 58 units here with a certified wattage that costs anywhere from $11 to $114 a year in electricity at the same tariff, a 10× spread. Median $26. Over five years the gap between the ends is larger than most of these machines cost to buy, and no retailer prints it, because it takes AHAM's certified wattage joined to a power price.
True HEPA
38 of 62
carry a true-HEPA filter. CADR already measures what actually reaches the room, so a high CADR without the HEPA label still cleans — the label is not the performance.
CADR and coverage are AHAM-certified; wattage is AHAM's smoke-mode figure. Annual cost assumes continuous running at $0.1883/kWh, the EIA US average — divide by your own hours if you run it less. Replacement filters are the other running cost and are not in this figure; AHAM does not certify filter price or life, so we do not estimate it.
The 20 highest-Smoke CADR of 62 certified units · 5 with a verified place to buy
| Brand & model | Smoke CADR | Coverage | Dust CADR | Watts | Per year | Buy |
|---|---|---|---|---|---|---|
| Atmosphere MINI 124746IN | 130 | 200 sq ft | 130 | 21 W | $34/yr | no listing |
| Whirlpool WPT80 | 129 | 199 sq ft | 137 | 43 W | $70/yr | Buy |
| GermGuardian AC5250WPT | 122 | 189 sq ft | 132 | 49 W | $81/yr | Buy |
| GermGuardian AC5250PT | 122 | 189 sq ft | 132 | 49 W | $81/yr | no listing |
| GermGuardian AC5350 | 116 | 180 sq ft | 124 | 41 W | $67/yr | no listing |
| GermGuardian AC5350B | 116 | 180 sq ft | 124 | 41 W | $67/yr | no listing |
| DREO HOME DWAP08 | 115 | 178 sq ft | 121 | 22 W | $36/yr | no listing |
| DREO HOME DWAP08S | 115 | 178 sq ft | 121 | 22 W | $36/yr | no listing |
| DREO DR-HAP008S | 115 | 178 sq ft | 121 | 22 W | $36/yr | Buy |
| DREO DWAP08S | 115 | 178 sq ft | 121 | 22 W | $36/yr | no listing |
| DREO DR-HAP008 | 115 | 178 sq ft | 121 | 22 W | $36/yr | Buy |
| DREO HOME DR-HAP008S | 115 | 178 sq ft | 121 | 22 W | $36/yr | Buy |
| DREO HOME DR-HAP008 | 115 | 178 sq ft | 121 | 22 W | $36/yr | no listing |
| DREO DWAP08 | 115 | 178 sq ft | 121 | 22 W | $36/yr | no listing |
| Honeywell (Canada) HPA4100WC | 109 | 169 sq ft | 117 | 16 W | $26/yr | no listing |
| Honeywell HPA4100B | 109 | 169 sq ft | 117 | 16 W | $26/yr | no listing |
| Honeywell HPA4100W | 109 | 169 sq ft | 117 | 16 W | $26/yr | no listing |
| Honeywell (Canada) HPA4100BC | 109 | 169 sq ft | 117 | 16 W | $26/yr | no listing |
| Honeywell (Canada) HPA104C | 100 | 155 sq ft | 106 | 40 W | $65/yr | no listing |
| GermGuardian AC4820 | 99 | 153 sq ft | 116 | 30 W | $49/yr | no listing |
Showing the top 20 by Smoke CADR. All 62 certified units in this group are filterable in the full product list — we rank here rather than dump, because a table nobody can read is not a resource.
Capacity and efficiency are AHRI-certified values; $/MMBtu is computed by us from EIA energy prices — see methodology. Heat at 5°F is the number that decides whether a heat pump keeps up in real cold, and most listings omit it.