Honeywell · No-frills power
Honeywell HPA300
A plain, powerful purifier: 300 cfm of AHAM-verified smoke CADR with simple touch controls and a turbo setting, but no sensor or auto mode.
- 300 cfm smoke CADR
- 5-year warranty
$269.95at honeywellstore.com · Nov 2026
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- smoke CADR: clean air it moves each minute
- 300 cfm
- room size it suits, every day
- 43 m²
- 465 ft²
- room size on smoggy days
- 28 m²
- 300 ft²
Honeywell HPA300 at a glance
- Smoke CADR
- 300 cfm (AHAM)
- Filter
- Carbon pre-filter and True HEPA
- Replacement filters
- Honeywell R HEPA filter and A pre-filter
- Controls
- Touch controls, Turbo setting, 2/4/8-hour timer, dimmer
- Warranty
- 5 years (maker's listing)
- Weight
- About 17 lb (7.7 kg)
Which rooms it suits
Everyday: AHAM's room size. Smog: AHAM's advice for smoke, a CADR at least equal to the floor area in ft².
| Room | Everyday | Smog days |
|---|---|---|
| Bedroom · 15 m² (161 ft²) | ||
| Living room · 30 m² (323 ft²) | ||
| Large room · 50 m² (538 ft²) |
Our take
The HPA300 has been around for years and still offers a lot of clean air for its size: a smoke CADR of 300 cfm, enough for a room of about 43 m². Its controls are basic touch buttons with a timer and a dimmer.
There is no sensor and no auto mode, so you set the level yourself. On a bad-air day that means Turbo, which is its loudest setting.
What's good
- 300 cfm, with a Turbo setting
- Buttons only: nothing to set up
- 5-year warranty
What's not
- Takes three R filters at once
- A separate pre-filter to replace too
Its filter: Honeywell HPA300 Replacement Filter R (HRF-R3) · $89.95 at honeywellstore.com
Good for
- Rooms up to about 43 m²
- People who want a strong, simple machine with no app
Skip it if
- You want it to adjust itself: there's no sensor or auto mode
How it compares
Every air purifier in the shop.
| Product | Best for | Smoke CADR | Room size | Price |
|---|---|---|---|---|
| Levoit Core 300S | Smart bedroom | 141 cfm | 20 m² | $149.99 |
| Levoit Core 300 | Budget bedroom | 143 cfm | 21 m² | $89.99 |
| Levoit Vital 100S | Pet-friendly bedroom | 143 cfm | 21 m² | $119.99 |
| Coway Airmega 150 | Small & quiet | 153 cfm | 22 m² | $189.99 |
| Levoit Core 400S | Shows PM2.5 | 231 cfm | 33 m² | $189.99 |
| Winix C545 | Everyday pick | 232 cfm | 33 m² | $209.99 |
| Coway Airmega AP-1512HH Mighty | Best overall | 233 cfm | 34 m² | $239.99 |
| Coway Airmega AP-1512HHS (Mighty with Wi-Fi) | Smart Mighty | 233 cfm | 34 m² | $299.99 |
| Coway Airmega 200M | Mighty's twin | 233 cfm | 34 m² | $229.99 |
| Levoit Vital 200S | Pet homes | 250 cfm | 36 m² | $169.99 |
| Honeywell HPA300 (this one) | No-frills power | 300 cfm | 43 m² | $269.95 |
| Coway Airmega 400 | Big rooms | 376 cfm | 54 m² | $649.00 |
| Levoit Core 600S | Large rooms | 391 cfm | 56 m² | $299.99 |
| Blueair Blue Pure 211i Max | Most clean air | 435 cfm | 63 m² | $349.99 |
| Filtrete MPR 1900 MERV 13 filters for a DIY box-fan purifier (4-pack) | Budget build | — | — | $87.99 |
Its filter, and related models
Honeywell HRF-R3 True HEPA Filter R (3-pack)HPA300 · $89.95
In our buying guides
Questions about the HPA300
- What size room does the Honeywell HPA300 cover?
- About 465 ft² (43 m²). That's AHAM's room size for its smoke CADR of 300 cfm: the floor area, with an 8 ft ceiling, whose air it cleans about every 12.5 minutes.
- Is the Honeywell HPA300 enough for smog?
- For smoke and heavy smog AHAM suggests a smoke CADR at least equal to the floor area in square feet. By that measure the Honeywell HPA300 keeps up with a room of about 300 ft² (28 m²). Keep the windows shut and run it on high while the AQI is bad.
- Why does Honeywell say the HPA300 cleans 2,250 ft²?
- That figure assumes the room's air is cleaned once an hour. AHAM's suggested room size, which assumes about five times an hour, is 465 ft² (about 43 m²).
How we judge. We haven't tested the HPA300 in a lab of our own. The figures come from independent ratings (AHAM, Energy Star, NIOSH, the ASPCA) or the maker, and the verdict is ours, from those figures. No brand pays to be listed. Last checked Nov 7, 2026.
Honeywell HPA300
$269.95 list price