A room-sized HEPA air purifier costs $60–$150; whole-home and smart models with app control run $200–$500. Amazon, Best Buy, and Target carry the widest selection with frequent 20–30% discounts.
About our pricing: Cheapzix compares retailer listings when available. We include Amazon (which Google Shopping leaves out), Best Buy, Walmart, Target and more. Prices and availability can change by retailer. Read our affiliate disclosure. Always verify details on the retailer site before buying.
About Air Purifier
Popular models: Levoit Core 300S ($99, 219 sq ft), Coway AP-1512HH ($119, 360 sq ft), Winix 5500-2 ($179, 360 sq ft), and Blueair Blue Pure 211+ ($299, 540 sq ft).
Best deal: The Coway AP-1512HH Mighty ($99–$119 at Amazon) consistently tops best-air-purifier lists — true HEPA, carbon pre-filter, air quality indicator light, and auto mode in a 360 sq ft unit.
Premium pick: The Blueair Blue Pure 211+ ($249–$299) covers 540 sq ft with a washable fabric pre-filter and 360-degree air intake — the best large-room purifier for open-plan living areas.
Where to Buy Air Purifier
Amazon, Best Buy, Target, Costco, Home Depot The comparison above covers the major retailers so you can review options before buying.
Buyer Questions
Do air purifiers actually work?
Yes — true HEPA purifiers capture 99.97% of particles 0.3 microns and larger, including dust, pollen, pet dander, and most smoke particles. They're most effective in a closed room.
How often should I replace the HEPA filter?
Every 6–12 months for most models; pre-filters should be cleaned monthly. Filter light indicators on models like the Coway Mighty remove the guesswork.
What room size air purifier do I need?
Match the purifier's CADR (Clean Air Delivery Rate) to your room size — aim for a purifier that can cycle the room's air volume at least 4–5 times per hour.
Should I run an air purifier 24/7?
Yes for best results — air quality degrades within hours of turning off the purifier. Modern HEPA purifiers draw only 20–60W on low settings, costing $2–$5/month to run continuously.