How large a room can it clean?

Its CADR of 265 for pollen suits bedrooms, offices and small living rooms. It is not meant for large open-plan spaces.

Does it need a replacement filter?

Yes. It uses a replaceable true HEPA filter and a UV-C bulb, both sold separately. The pre-filter and odor layer are not permanent.

Yes. The ionizer can be switched off independently, so you can run HEPA and UV-C only.

No. It has no app, Wi-Fi, remote or voice assistant support. All controls are on the unit.

The low setting is marketed as ultra quiet for light sleepers. Owners say the highest speed is noticeably loud.

The purifier comes with its HEPA filter and UV-C bulb installed. Replacement filters and bulbs are sold separately.

7 stores we checked sell it, including Sylvane, Kohl's, Staples, Best Buy, Guardian Technologies.

At Guardian Technologies, for $249.99, 25% under what the other stores charge, as of our latest check.

$249.99at Guardian TechnologiesChecked 39 min ago

25% under what the other stores charge

Compared across 7 stores. Prices are checked against each store and labelled with when.