Multiple Brands (SmarterHEPA, Smart Air) - Blast Mini Mk II

Definitely don't get a Shark. Coway as someone else recommended is a good brand. Especially if all you're after is particulate filtration. You could also look at Smart Air lineup like the Smart Blast Mini. It's more expensive than Coway but their machines will probably last a lifetime for you.

If I were buying today and had $600/filter to spend, I’d get a SmartAir Blast Mini. So quiet. So efficient. I’d also check out the reviews on HouseFresh. FWIW, I hate the CR box I built in 2020. It is loud, big, and ugly.

There isn’t a purifier that exists in that price range that can provide 5 air changes an hour for 1,500 square feet. The Smart Air Blast - MKII is your best bet. It’s rated for 1,600 square feet. You could buy 3 AirFanta 3 Pros

It's still not providing 4-5 air changes an hour to 3,000 square feet The SmartAir Blast Mini has a CADR of 435 CFM. It's rated for a max room size of 700 square feet. The BlueAir 211i Max has a CADR of 410 CFM. Max room size is in the 600s.

For most applications, Coway has the best build quality of the brands here. I should also mention Blueair, [which offers a 5 years warranty with registration for certain models](https://www.blueair.com/us/warranty.html). All Blueair purifiers utilize an always-on ionizer to electrostatically charge the filtration media. While I'm not quite certain on comparisons, Smart Air's Blast and Blast Mini air purifiers might be similar in quality or greater to Coway's higher-end Airmega purifiers. But those two Smart Air models are expensive. For the [Coway Airmega 300/300S, 400/400S, Icon/IconS\*, and ProX models, the warranty period is 5 years](https://cowaymega.com/pages/warranty-registration). \*We don't recommend the Icon or IconS models as they're poor value for money.