Does this cover 835 or 240 square feet? It says both in the description.
the specifications on the box/manual say certified for 240 sq ft. But elsewehere (not certified) on the box it says 835 sq ft. So I would recommend going with the smaller number – basically this unit is designed for a “large room”.
Note that this has 4 filter types, which total around $100, but I could not find any “kits” like I find normally with multi-stage filter air purifiers, so each filter has to be purchased separately (seems like an unnecessary hassle and also expensive).
The replacement guidelines state 8 hour run times on level 2 fan; I usually run mine 24/7 and usually on high mode (would be level 4 in this case I believe).