The Dreo HEPA Air Purifier typically retails for $180, but you can catch it on sale for just $66 during Walmart Deals week. It's small enough to fit practically anywhere (think an end table or desk) and shoppers say this "powerful little thing" is "super quiet."

These are the best air purifiers you can buy in every category, from Levoit Core 600S and BlueAir Blue Pure 411i Max to Dyson Purifier Cool PC1.

One early deal to have on your radar is the $180 Bissell Air180 Air Purifier, which is on sale at Amazon right now for only $84. Shoppers are pleased with its performance, calling it a "workhorse for allergy relief." Get it.

The most effective filters have what’s called high-efficiency particulate air certification. Better known as HEPA filters, they can capture up to 99.97 percent of common particle pollutants like mold, dust, pet dander, pollen and smoke.

These are the best air purifiers for pets, from Levoit Vital 200S and AirDoctor AD3500 to SwitchBot Table Air Purifier.

I rely on the Airmega AP-1512HH Mighty at home. With 4-stage HEPA filtration and wildfire filter options, it’s a smart buy at 35% off for Prime Day.

Compared to other air cleaners, the Rabbit Air BioGS 2.0 Air Purifier makes a loud statement by being quiet and unobtrusive. All of this while monitoring the atmosphere and ramping up its action during an air quality crisis.