What size room is the Windmill purifier best for?Updated 6 months ago

You can use the Windmill Purifier for any space up to 1,950 sq. ft, and it depends on the time needed to clean. See below:
Per 5 min        162.5 sq. ft.
Per 12.4 min    403 sq. ft.
Per 30 min       975 sq. ft.
Per 60 min       1950 sq. ft.

We are officially rated for 400 sq. ft. (260 CADR, 8 foot ceilings).