Air Purifiers
Best Air Purifier Under $100 (2026): Top 3 by the Specs
As an Amazon Associate we earn from qualifying purchases. Specs below come from each product's Amazon listing; we do not test products in person.
For this search, the Levoit leads with a 28 dB noise level and 263 sq ft of rated coverage by the maker. The Holmes adds a 70 CADR and a HEPA filter for small rooms, while the GermGuardian is rated for up to 743 sq ft by the maker for larger spaces.
Starting out? See the main guide: Best Air Purifier
Top picks at a glance
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Best OverallLevoit Air Purifier for Home Pets Bedroom9.8 View on Amazon -
9.6 View on Amazon -
Largest Stated CoverageGermGuardian HEPA Large Room Air Purifier Tower9.2 View on Amazon
Compare the specs
Ranked on cadr, coverage (maker's figure), hepa filter, rated noise level, speed settings from each listing, plus how many buyers have rated it. A dash (—) means we could not confirm that figure from the listing.
| Pick | CADR | Coverage (maker's figure) | HEPA filter | Rated noise level | Speed settings | Weight | Warranty |
|---|---|---|---|---|---|---|---|
| 1. Levoit Air Purifier for Home Pets Bedroom | — | 263 sq ft | — | 28 dB | — | 6 lb | — |
| 2. Holmes Desktop HEPA Type Air Purifier | 70 CFM | 109 sq ft | Yes | 70 dB | 3 speeds | — | 3-year |
| 3. GermGuardian HEPA Large Room Air Purifier Tower | — | 743 sq ft | Yes | 55 dB | 3 speeds | 10 lb | — |
Levoit Air Purifier for Home Pets Bedroom
It pairs a 28 dB noise level with 263 sq ft of rated coverage by the maker and a 3-layer filter.
- Coverage (maker's figure): 263 sq ft
- Rated noise level: 28 dB, the lowest rated here
Good for
- Owners of bedrooms who want a 28 dB unit
- Buyers who want a night light
Skip it if
- You need more than 263 sq ft of rated coverage
- You need a unit under 6 lb
It uses a 3-layer filter with a fine pre-filter, a main filter, and an activated carbon filter. It has touch control and an optional night light, and it runs on 11 watts. The box holds the purifier, a pre-installed filter, and a user manual.
Holmes Desktop HEPA Type Air Purifier
It brings a 70 CADR, a HEPA filter, and 3 speeds to small rooms up to 109 sq ft.
- CADR: 70 CFM
- Coverage (maker's figure): 109 sq ft
- HEPA filter
- Rated noise level: 70 dB
- Speed settings: 3 speeds
- 3-year warranty stated
Good for
- Owners of small rooms up to 109 sq ft
- Buyers who want an optional ionizer
Skip it if
- You need more than 109 sq ft of rated coverage
- You need a noise level under 70 dB
It captures particles as small as 2 microns and removes up to 99% of airborne particles. It has an optional ionizer, 3 speed settings, and touch control, and it runs on 45 watts. It carries a 3-year limited warranty and fits on a table or desktop.
GermGuardian HEPA Large Room Air Purifier Tower
It is rated for up to 743 sq ft by the maker and adds a HEPA filter, UV-C light, and 3 speeds.
- Coverage (maker's figure): 743 sq ft, the largest here
- HEPA filter
- Rated noise level: 55 dB
- Speed settings: 3 speeds
Good for
- Owners of rooms near 743 sq ft who want one unit
- Buyers who want a UV-C light
Skip it if
- You need a unit under 10 lb
- You need a noise level under 55 dB
It has a HEPA filter with an activated carbon filter, an air quality indicator, and a quiet sleep mode. Its fan speed adjusts on its own when poor air is detected, and it has a night mode. It measures 6 by 9.5 by 22 inches and weighs 10 pounds.
How to choose
Match coverage to room size
Coverage is the maker's own figure for one unit, so compare it with the room you plan to use. The Levoit is rated for 263 sq ft, the Holmes for 109 sq ft, and the GermGuardian for 743 sq ft, all by the maker. Pick a unit whose rated coverage covers the room, not one rated far below it.
Read CADR apart from coverage
CADR measures how much filtered air a unit delivers, and it is not the same as square feet. Only the Holmes states a CADR here, at 70, so it is the only pick you can compare on that figure. Use CADR when you want delivery strength, and use rated coverage when you want room fit.
Check noise and upkeep
Noise levels here run from 28 dB on the Levoit to 70 dB on the Holmes, with the GermGuardian at 55 dB. Check the figure before you buy, since a higher number means a louder unit. Also check what the box holds, since the Levoit ships with a pre-installed filter and the Holmes carries a 3-year limited warranty.
FAQ
What coverage does the GermGuardian offer?
The maker lists 743 sq ft for the GermGuardian, with 153 sq ft for small bedrooms on a faster cycle. Use the 743 sq ft figure for room fit, and check the smaller figure for a faster air change.
Does the Holmes have a HEPA filter?
Yes, the Holmes has a HEPA filter and a 70 CADR, with 3 speed settings and an optional ionizer. It is rated for rooms up to 109 sq ft by the maker.
Which pick lists a 28 dB noise level?
The Levoit lists a 28 dB noise level, with 263 sq ft of rated coverage by the maker and a 3-layer filter. It also has an optional night light and touch control.
What comes in the Levoit box?
The box holds the purifier, a pre-installed filter, and a user manual. It runs on 11 watts and has touch control and an optional night light.
