The Amazon page for this model shows it as currently unavailable. Details come from the older review and the maker’s claims. Replacement picks were checked on Amazon on October 15, 2026. CADR, power and noise figures come from the older review and were not retested.
The Honeywell HPA300 was a large-room purifier with a long track record. Its Amazon page is currently unavailable. This page keeps the review for owners and points to what to buy now.
Table of Contents
Best Replacement Today
Price on Amazon: $179.99 | 4.6 stars from 32,416 ratings (checked October 15, 2026)
What the Honeywell HPA300 Was
The Honeywell HPA300 was a large True HEPA purifier with a pre-filter, four cleaning levels and a plain look. The older review gave its size as 22.4 inches tall, 20 inches wide and 10.8 inches deep, and its weight as 17 pounds. It was marked Energy Star qualified. The Amazon page shows it as currently unavailable as of October 15, 2026, with no price. It had about 31,000 ratings and a 4.6 average.
Looking ahead, the Honeywell HPA300 is the kind of large-room purifier that sold for a decade, and the Amazon page now shows it as currently unavailable. The old page had over 31,000 ratings, a number most new units will not reach for years. The catch is that a Honeywell filter kit is listed at $78.99, so owners can keep the unit running a while.
What the Older Review Said
- Filters. A pre-filter and a True HEPA filter that catches 99.97 percent of particles at 0.3 microns, with filter-change notices on the outside.
- Speeds. Three levels plus a turbo mode, and a timer for 2, 4 or 8 hours.
- No auto mode. There is no air quality sensor.
- CADR. 320 for dust, 300 for smoke and 300 for pollen.
- Power. 129 watts on turbo and 42 watts on low.
- Noise. Quiet on low and very loud on turbo.
- Care. Honeywell advises cleaning every 3 months. A Honeywell filter kit is listed at $78.99; check the model before you order.
The risk to watch is the filter fit and the noise. A kit for a different Honeywell model will not seal the HPA300, and the older review said the unit is very loud on the turbo setting. The unit also draws 129 watts on turbo, against 42 watts on low. Expect owners to run it on low and see less cleaning. Check the model number on any filter kit, and plan the room size at the five-changes-an-hour figure of 465 square feet only if you run the fan on high.
CADR and Real Room Size
The CADR math holds up here. A 465 square foot room with an 8 foot ceiling holds 3,720 cubic feet. At the smoke CADR of 300 CFM, one air change takes about 12 minutes, or about five an hour. That matches the older review, but only on the turbo setting. On low, the airflow drops a lot, so the unit covers a much smaller room. See what CADR means and air purifiers for large rooms.
Running Cost and Filters
At 129 watts on turbo, running the unit for 8 hours uses about 1 kilowatt-hour a day. On low, at 42 watts, it uses about one third as much. Add a filter kit every year and the bill is real. Use the air purifier filter replacement cost guide to compare the running cost with newer units.
What to Buy Instead
The older review compared the HPA300 with the AirDoctor 3000, the Alen BreatheSmart Classic, the IQAir HealthPro Plus and the Bissell AIR400. For a well-reviewed large-room choice today, see our Coway Mighty review and the AirDoctor vs Coway comparison.
Prices and Alternatives on Amazon
Prices and ratings were checked on Amazon on October 15, 2026.
Price on Amazon: $179.99 | 4.6 stars from 32,416 ratings (checked October 15, 2026)
The Winix 5510 is listed for up to 1,881 square feet in one hour with true HEPA, a carbon filter and app support. It has a 4.6 rating from over 32,000 ratings.
Price on Amazon: $229.99 | 4.6 stars from 29,228 ratings (checked October 15, 2026)
The Coway Mighty AP-1512HH is listed for up to 1,748 square feet with an air quality monitor, auto and eco modes and a 3-year warranty. It has a 4.6 rating from over 29,000 ratings.
Price on Amazon: $89.99 | 4.7 stars from 109,039 ratings (checked October 15, 2026)
The Levoit Core 300-P is listed with a CADR of 143 for smoke, 153 for dust and 167 for pollen. It has a 4.7 rating from over 109,000 ratings.
Price on Amazon: $169.99 | 4.5 stars from 2,574 ratings (checked October 15, 2026)
The Blueair Blue Pure 311i Max is listed for up to 2,107 square feet with Wi-Fi, auto mode and 23 dB quiet filtration. It has a 4.5 rating from over 2,500 ratings.
Pros and Cons
Pros: strong CADR; True HEPA filter; Energy Star qualified; timer; filter-change notices; long track record.
Cons: currently unavailable on Amazon; no auto mode; very loud on turbo; large and heavy; filter kit costs $78.99.
FAQ
Is the Honeywell HPA300 still sold on Amazon?
The Amazon page shows it as currently unavailable as of October 15, 2026, with no price. A Honeywell filter kit is listed at $78.99.
How big a room does it clean?
About 465 square feet at five air changes an hour on the turbo setting, from its smoke CADR of 300.
Does it have an auto mode?
No. The older review said it has no auto mode and no air quality sensor.
How much power does it use?
About 129 watts on turbo and 42 watts on low, per the older review.
Final Word
The HPA300 was a solid large-room purifier, but it is out of stock. A Winix 5510 or a Coway Mighty gives you auto mode and a steady filter supply.
What happens next: the HPA300 may come back, but a Winix 5510 or a Coway Mighty is a better-reviewed buy for a large room today.
Related Guides
Keep going with Coway Mighty review, air purifiers for large rooms, what CADR means, air purifier filter replacement cost guide and AirDoctor vs Coway.
