Best air purifier under $100?

Combined ranking

1. 1
   Levoit Core 300▲114 pts

   GPT #2Claude #1Gemini #1

   The best CADR-per-dollar under $100 — true HEPA plus carbon filtration, covers ~200 sq ft effectively, very quiet on low, cheap widely available replacement filters, and a proven track record as the default budget pick

   To stay #1 Add an air quality sensor with auto mode at the base price instead of reserving it for the pricier 300S

2. 2
   CCoway Airmega 100▼18 pts

   GPT #1Claude —Gemini #3

   Strong small-room CADR, True HEPA filtration, PM2.5 auto mode, very quiet sleep mode, low filter cost, and reputable Coway build quality when found under $100

   To rank higher Make the under-$100 price permanent

3. 3
   Levoit Core 200Snew5 pts

   GPT —Claude #3Gemini #4

   Smart features (app control, scheduling, voice assistant support) for under $90, near-silent sleep mode, and compact enough for desks and nightstands

   To rank higher Boost its modest CADR, which trails the Core 300 enough that the smart features don't fully compensate

4. 4
   BBlueair Blue Pure 511i Maxnew4 pts

   GPT —Claude #2Gemini —

   Punches above its size with excellent particle removal, extremely low noise and power draw, app connectivity and auto mode rare at this price, plus washable fabric pre-filters

   To rank higher Increase coverage area — it's limited to small bedrooms and offices, so a stronger fan would let it compete for the top spot

5. 5
   XXiaomi Smart Air Purifier 4 Compactnew4 pts

   GPT —Claude —Gemini #2

   Offers class-leading smart features including Wi-Fi connectivity, app control, Alexa/Google Home voice assistant support, and a built-in PM2.5 sensor with automated speed adjustment.

   To rank higher Enhance the thickness and density of its activated carbon filter layer to improve the adsorption of heavy odors and volatile organic compounds.

6. 6
   WWinix A231new3 pts

   GPT —Claude #4Gemini #5

   True HEPA with activated carbon and PlasmaWave in a compact unit frequently on sale well under $100, solid smoke and allergen performance for small rooms

   To rank higher Improve filter replacement cost and availability, which run higher per year than Levoit's ecosystem

7. 7
   CClorox Medium Room Air Purifier▼43 pts

   GPT #3Claude —Gemini —

   True HEPA filtration, 360-degree intake, auto mode, clear air-quality display, good sale pricing, and strong everyday allergen value for bedrooms and apartments

   To rank higher Improve high-speed noise and smoke/odor performance

8. 8
   BBlueair Blue Pure 511▼42 pts

   GPT #4Claude —Gemini —

   Quiet, compact, energy-efficient, washable fabric prefilter, good bedroom usability, and better design than most cheap purifiers

   To rank higher Increase CADR enough to handle larger rooms

9. 9
   GGermGuardian AC4825Enew1 pts

   GPT —Claude #5Gemini —

   Tower form factor fits tight spaces, combines HEPA, carbon, and UV-C at a street price around $80, and has years of reliability data

   To rank higher Reduce noise on medium and high settings, which is the main reason reviewers rank it below the quieter Levoit and Blueair units

10. 10
    OOneisall Pet Air Purifier▼51 pts

    GPT #5Claude —Gemini —

    Unusually strong specs for the price, double-sided intake, HEPA plus carbon filtration, auto particle detection, washable prefilters, and very good pet-dander value

    To rank higher Build a longer, better-documented filter and reliability track record

Rank history

By model

Tracked by ModelsAgree · rank 1 = 5 pts … rank 5 = 1 pt · re-polled continuously