Honeywell Allergen Plus
By Honeywell · Air Purifiers · Home & Workspace · More from Honeywell
- HEPA filter captures 99.97% of airborne particles down to 0.3 microns
- Recommended for small rooms up to 110 sq ft (4.8 ACH)
- 3 cleaning levels plus Turbo setting
- Dimensions: 6.92 x 6.92 x 10.94 in, weighs 3.89 lbs
- 5-year limited warranty
Lowest price seen
$61.18
from $61.18 at OfficeCrave · Checked Oct 12, 2026
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Summary
A compact tabletop HEPA purifier rated for rooms up to 110 sq ft, with a washable pre-filter, a carbon stage and a 5-year limited warranty. Check the room size before you buy: at 110 sq ft it suits a bedroom or office, not a living space.
Strengths
- AHAM Verifide and ENERGY STAR certified, with zero ozone.
- A 5-year limited warranty, longer than most small purifiers offer.
- Tiny footprint, so it fits on a nightstand or desk.
- Replacement Filter O is sold by Honeywell and by third parties.
- Sleep mode dims the lights and quiets the fan for a bedroom.
Weaknesses
- Covers only 110 sq ft, and CADR is low at 71-79 cfm.
- No auto mode, air-quality sensor, app, Wi-Fi or remote.
- Public owner feedback is nearly nonexistent.
- The washable pre-filter has to be cleaned every 2-4 weeks.
- No user-serviceable internal parts.
Verified specifications
| Model | HPA120 series (HPA120B black, HPA120W white). |
|---|---|
| Region/electrical | US 120 V. |
| Room size | 110 sq ft at 4.8 air changes per hour; also marketed as 1 air change per hour in 530 sq ft. |
| HEPA capture | up to 99.97% of particles 0.3 microns and larger that pass through the filter. |
| Filtration | 3-in-1 Filter O (HRFO1) combining a washable pre-filter, activated carbon and HEPA in one cartridge. |
| Cleaning levels | 3 - Germ, General Clean, Allergen. |
| Timer | auto-off after 2, 4 or 8 hours. |
| Sleep mode | dims the lights and lowers the fan. |
| Filter indicator | filter-check light with a reset button. |
| CADR (ENERGY STAR / AHAM) | smoke 71 cfm, dust 79 cfm, pollen 79 cfm, PM2.5 75 cfm. |
| Ozone | 0.0 ppb; the unit has no ionizer. |
| Energy | ENERGY STAR certified with the Most Efficient tag; 72 kWh a year and 6.1 cfm/W. |
| Wattage | 13 W. |
| Dimensions | 6.92 x 6.92 x 10.94 in (W x D x H). |
| Weight | 3.89 lbs, though retailers list 3.1-3.4 lbs. |
| Warranty | 5-year limited. |
Full research notes and sources
Filters and running costs
The Filter O HEPA cartridge is replaced every 9-12 months and the pre-filter is cleaned every 2-4 weeks. Consumer Reports puts annual filter cost at $53 and annual electricity at $12, against measured energy use of 72 kWh a year. Replacement Filter O is sold by Honeywell and by third parties, so you are not locked into one supplier.
Is it worth it?
Honeywell Store lists the HPA120B and HPA120W at $74.95, and Target and Shipt have shown it on sale at $59.99 from $74.99. Up to about $75 it is a reasonable small-room pick for the certification, the 5-year warranty and the footprint. Above $100 the coverage and feature set look weak next to larger purifiers.
Which model this is
This page covers the Honeywell HPA120 series, sold as the HPA120B (black) and HPA120W (white), ASIN B00LG8BQAI. Do not confuse it with the smaller HPA020B or the larger HPA100, HPA200 and HPA300 consoles. Despite some listings, there is no Turbo setting on this model: the manual lists three cleaning levels only.
Sources
Manufacturer:
- Honeywell HPA120 series owner’s manual (PDF)
- Honeywell HPA120 small-room purifier page
- Honeywell Store HPA120B
- Honeywell Store HPA120W
- ENERGY STAR certified room air cleaners: HPA120
Independent reviews:
- Consumer Reports: Honeywell HPA120W air purifier
- RedditRecs: Honeywell air purifier reviews
- Levoit Core Mini-P
Owner reports:
