Details come from the older review, the maker’s claims and the Amazon listing, checked on October 15, 2026. The listing’s coverage figure uses a different air-change rate than the older review, so both are explained. Noise and filter-life figures come from the older review and were not retested.
The Levoit Core 300 is one of the best-selling small air purifiers. Here is what it does, how big a room it really cleans and what the filters cost.
Table of Contents
What You Get
Price on Amazon: $89.99 | 4.7 stars from 109,039 ratings (checked October 15, 2026)
Design and Size
The Core 300 is a tall, round, matte white tower, about 12.2 inches high and 8.7 inches wide. It pulls air in from all sides (360 degrees) and blows it out the top. A touch panel sits on top. It is light enough to carry from room to room and sits easily on a floor or a table.
Looking ahead, small round purifiers like the Levoit Core 300 will keep winning on price and looks. Levoit sells several versions of the same shape, and the 300 now carries a CADR rating checked by the AHAM test body. The catch is that cheap hardware leads to repeat filter sales, and the filter is where the real cost sits.
Filtration and Features
- Filters. A pre-filter for hair and dust, a true HEPA filter for 99.97 percent of particles at 0.3 microns, and an activated carbon layer for odors and some gases.
- Fan. Three speeds plus a sleep mode.
- Timer. 2, 4, 6 or 8 hours.
- Filter light. A reset indicator tells you when to change the filter.
- Auto mode. None, which the older review counted as a gap.
- Ozone. The older review called the air ozone free.
Levoit advised changing the filter every 6 to 8 months. The pre-filter cannot be washed, so vacuum it or use a soft brush.
The risk to watch is the coverage figure. The older review said the Core 300 cleans a 219 square foot room about five times an hour. The Amazon listing now says up to 1,073 square feet. Both are right, because they use different air-change rates. At one change per hour, the same unit takes 60 minutes to clean the air in that big room, which is not much help for allergies. Expect more listings that lead with the biggest number. Match the unit to the smaller room figure and plan for a filter every 6 to 8 months.
Noise, CADR and Room Size
The older review gave 24 dB in sleep mode and about 50 dB at the top speed. It said the CADR is 141 for smoke, and that it cleans a 219 square foot room about five times an hour. Do the math: 219 square feet at an 8 foot ceiling is about 1,750 cubic feet, and 141 cubic feet a minute clears that in about 12 minutes. The current listing gives a CADR of 143 for smoke, 153 for dust and 167 for pollen, and says up to 1,073 square feet. That figure is one air change an hour (about 8,600 cubic feet at 143 CFM, or about 60 minutes). See what CADR means.
Filter Cost
The unit is cheap and the filters are the running cost. The older review called the filters pricey for the machine and said they need replacing often in a dusty home. Our air purifier filter replacement cost guide shows how to estimate a year of filters before you buy.
Core 300 vs Other Small Purifiers
We reviewed this model again in our newer Levoit Core 300 review, with more on the current filter lineup. For a head-to-head, see AirDoctor 1000 vs Levoit Core 300. For quiet bedroom choices, read air purifiers for a bedroom.
Prices and Alternatives on Amazon
Prices and ratings were checked on Amazon on October 15, 2026.
Price on Amazon: $89.99 | 4.7 stars from 109,039 ratings (checked October 15, 2026)
The Levoit Core 300-P is listed with an AHAM Verified CADR of 143 for smoke, 153 for dust and 167 for pollen, a 56 watt motor and a three-in-one filter. It has a 4.7 rating from over 109,000 ratings.
Price on Amazon: $43.98 | 4.6 stars from 45,932 ratings (checked October 15, 2026)
The Levoit Core Mini-P is a small purifier for desks and dorm rooms. It has a 4.6 rating from over 45,000 ratings.
Price on Amazon: $78.92 | 4.6 stars from 4,124 ratings (checked October 15, 2026)
The SilverOnyx is a light five-filter purifier for small rooms, reviewed on this site. It has a 4.6 rating from over 4,100 ratings.
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 auto mode. It has a 4.6 rating from over 32,000 ratings.
Pros and Cons
Pros: true HEPA and carbon filtration; quiet at 24 dB on sleep; compact, light and portable; AHAM Verified CADR on the listing; timer and filter light; low price.
Cons: no auto mode; filters are a running cost; pre-filter is not washable; about 50 dB on high; coverage claims are confusing.
FAQ
How big a room does the Levoit Core 300 cover?
About 219 square feet at five air changes an hour, per the older review. The listing says up to 1,073 square feet, which is one air change an hour.
How loud is it?
About 24 dB in sleep mode and about 50 dB on high, per the older review.
How often do the filters need changing?
Levoit advises every 6 to 8 months, per the older review.
Does it have an auto mode?
No, per the older review. You set the speed yourself.
Final Word
The Levoit Core 300 is a very good small-room purifier at a low price. Match it to a bedroom-size room and budget for the filters.
What happens next: expect more small purifiers with app control, auto mode and filter-reminder subscriptions. For a bedroom or small office, the Core 300 class stays a good value if you budget for filters.
Related Guides
Keep going with our newer Levoit Core 300 review, AirDoctor 1000 vs Levoit Core 300, air purifier filter replacement cost guide, what CADR means and air purifiers for a bedroom.
