Why it matters
The Honeywell HPA5100B Air Purifier is a HEPA room unit air purifier that its maker rates for 900 square feet.
At the usual 4.8 air changes an hour and an 8-foot ceiling, a 900-square-foot rating implies about 576 cubic feet of clean air a minute. In a 12-by-15-foot bedroom that would turn the air over roughly 24 times an hour.
Filtration: HEPA. Quietest setting, per the listing: 55 db. Power draw: 80 watts.
Price-wise it sat in the cheapest third of the 74 hepa room unit models we cover when we checked; the button shows today's price.
It qualifies for our lists Best Air Purifiers for Allergies, Best Air Purifiers for Basements and Musty Odors, Best Air Purifiers for Home Offices, where it is ranked against every model that meets the same rule.
Its rated room size of 900 square feet is below the middle of the range we cover: 64 of the 152 purifiers with a stated figure come in lower, and the range runs from 62 square feet to 4,800 square feet.
Compared with the Honeywell AllergenPlus HPA304 Air Purifier: rated room size 900 square feet here vs 465 square feet.
Who it's for, and who should skip it
Good fit if
- Rooms up to about 900 square feet
- Allergy season
Look elsewhere if
- Whole-home filtration on its own
- Removing gases without a substantial carbon stage
Pros and cons
Pros
- Rated for 900 square feet
- Low setting 55 db
- 80 watts draw
Cons
- Filters are an ongoing cost
- Size to the room at 4.8 air changes per hour
Limitations to weigh
- Specifications are the maker's or seller's own figures; check fit against your equipment's model number and the actual size.
Specifications
The bracket shows where each figure comes from.
| Model number | HPA5100B | Retailer |
|---|---|---|
| Room coverage | 900 square feet | Retailer |
| Noise (seller) | 55 db | Retailer |
| Wattage | 80 watts | Retailer |
| Filter type | HEPA | Retailer |
Alternatives worth comparing
More air purifiers we cover
- Winix D480 Air Purifier $249.99
- Winix XQ 4 Stage Dual Filtration Smart Wi-Fi True HEPA Air Purifier $609.99
- Dreo DR-HAP003AS Air Purifier
- Austin Air HealthMate B400 Air Purifier
- SereneLife SLARP1076WT Air Purifier
All air purifiers, compared in one table · Every Honeywell product we cover
Final verdict
A solid choice for rooms up to about 900 square feet. Confirm the model it fits before ordering.
Where to buy
Each button opens this exact model. We may earn a commission on tracked links; it never changes what we publish. Disclosure