Many picks on the older page are unavailable, over the price limit or were not rechecked. Current prices were checked on Amazon on October 16, 2026. CADR figures come from the listings and the older page and were not retested.
Cheap purifiers can handle smoke if the CADR fits the room. Here is the math, what changed since the older page and four picks under $100.
Table of Contents
What Changed Since the Older Page
As of October 16, 2026, the GermGuardian AC4100CA is $104.99, which is over the $100 limit. The Levoit LV-H126 is $54.37, the KOIOS H13 is $48.87 and the Holmes Desktop is $54.28. The Afloia Miro is unavailable. The Vremi, the hOmeLabs, the Bissell MYair, the Levoit LV-H133 and the Purezone Halo were not rechecked.
Smoke CADR Is the Number That Counts
CADR for smoke is measured on tobacco smoke, the smallest of the three tests. It gives airflow in cubic feet a minute. Divide by the room: smoke CADR times 60, divided by 8 feet of ceiling, divided by the air changes you want. At five changes an hour, 143 CFM fits about 214 square feet, 100 CFM fits 150 and 50 CFM fits 75. See what CADR means.
Checking the Old Claims
The older page said a CADR of 129 means 7,740 cubic feet of smoke an hour. That is 129 times 60, which is right, and its 194 square feet at five changes is right too. But it said a HEPA filter will not remove smoke, which is wrong. A true HEPA filter catches smoke particles well. What it misses is the smell, which needs carbon. The page also named a CADR of 400 and 200 for cheap units without a source, so those figures were dropped.
What Under $100 Gets You
Sub-$100 units fit one bedroom, a home office or a dorm room. They do not fit a living room after a cigarette or a smoky meal. Add the filter price to the shelf price. Our Levoit Core 300 review and SilverOnyx review give the full picture. For outdoor smoke, see air purifiers for wildfire smoke.
Looking ahead, the under $100 smoke purifier is a tighter category than it was. Of the eight picks on the older page, the Afloia Miro shows as currently unavailable, and the GermGuardian AC4100 now costs $104.99, just past the limit. The catch is that the old page claimed most units at this price have a CADR of 100 or less, while the Levoit Core 300-P at $89.99 lists 143 for smoke.
4 Air Purifiers for Smoke Under $100
Prices and ratings were checked on Amazon on October 16, 2026.
Price on Amazon: $89.99 | 4.7 stars from 109,074 ratings (checked October 16, 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: $59.99 | 4.5 stars from 9,630 ratings (checked October 16, 2026)
The Afloia Kilo is listed for up to 1,500 square feet with 4-stage HEPA filtration, a washable pre-filter and a 22 dB sleep mode. It has a 4.5 rating from over 9,600 ratings.
Price on Amazon: $78.92 | 4.6 stars from 4,124 ratings (checked October 16, 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: $41.79 | 4.6 stars from 45,962 ratings (checked October 16, 2026)
The Levoit Core Mini-P is a small purifier for desks, dorm rooms and bedrooms. It has a 4.6 rating from over 45,000 ratings.
The risk to watch is the tiny unit that is sold for a big job. A desk model with a smoke CADR of 50 clears about 75 square feet at five changes an hour, and no more. Expect more compact units to quote a one-change-an-hour room size in the title. Look for a smoke CADR, and match it to the room before you buy.
Safety Notes
Do not smoke in a room just because a purifier is running. A small unit cannot clear a cloud of smoke in time, and the leftover residue sticks to walls and fabric. Skip any unit with an ion or plasma mode, since it can make ozone.
Filter Cost
Check the filter price and how long it lasts. A filter set for the Levoit LV-H132 is $29.96 for two. See the air purifier filter replacement cost guide to add it up.
FAQ
What is the best air purifier for smoke under $100?
The Levoit Core 300-P at $89.99, with a smoke CADR of 143, based on the listing.
Will a HEPA filter remove smoke?
It removes smoke particles. It does not remove the smell, which needs carbon.
Is the GermGuardian AC4100 under $100?
It is $104.99 on Amazon as of October 16, 2026, which is just over.
How big a room does a 50 CFM smoke CADR cover?
About 75 square feet at five air changes an hour.
Final Word
At this price, buy the smoke CADR and the filter supply. The Core 300-P leads, and the Kilo and SilverOnyx cover smaller rooms for less.
What happens next: expect more sub-$100 units to add a thicker carbon layer and a tested CADR, since the Core 300-P has set the bar. Keep the filter price in mind, because a cheap unit with a costly filter is not cheap in year two.
Related Guides
Keep going with air purifiers for wildfire smoke, what CADR means, Levoit Core 300 review, SilverOnyx review, air purifier filter replacement cost guide and best air purifiers for smoke.
