Key takeaways
- Match the clean air delivery rate (CADR) to your room size.
- True HEPA filters capture fine dust and pollen; carbon filters help with odors and smoke.
- Check filter replacement costs and noise at sleep settings.
In this article
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Before you spend money on air purifiers, it helps to know which specs actually change how you use them every day. Here is our short, practical checklist for buying air purifiers in the US.
What to check before you buy
- Match the clean air delivery rate (CADR) to your room size.
- True HEPA filters capture fine dust and pollen; carbon filters help with odors and smoke.
- Check filter replacement costs and noise at sleep settings.
How much to spend
The air purifiers we rate range from about $79 (Levoit Core 300 True HEPA Air Purifier) to about $550 (Coway Airmega 400S). A correctly sized purifier for the bedroom gives the most benefit for allergy sufferers.
The mistake to avoid
Buying a small purifier for a large room.
Our shortlist
If you want to skip the research, these are the air purifiers we would buy in the US:
- Coway Airmega AP-1512HH Mighty ($149 – $229) – Check Price on Amazon
- Coway Airmega 400S ($450 – $550) – Check Price on Amazon
- Levoit Core 400S ($180 – $220) – Check Price on Amazon
See every pick, with pros and cons, in Best Air Purifiers (2026): What to Buy and What to Skip.
When to buy
The deepest discounts usually arrive during the big summer sales in July, the October sales events and Black Friday through Cyber Monday in late November.
Compare more options
Search air purifiers on Amazon See top-rated air purifiers on Amazon
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Frequently asked questions
How do I choose the right air purifiers?
Match the clean air delivery rate (CADR) to your room size. True HEPA filters capture fine dust and pollen; carbon filters help with odors and smoke.
How much should I spend on air purifiers in the US?
The models we rate range from about $79 to about $550. A correctly sized purifier for the bedroom gives the most benefit for allergy sufferers.
What is the biggest mistake when buying air purifiers?
Buying a small purifier for a large room.
When should I buy air purifiers in the US?
The deepest discounts usually arrive during the big summer sales in July, the October sales events and Black Friday through Cyber Monday in late November.