[nerdbaggy]

Yeah they are expensive but the best I have found. The 45i is for like 700 square feet for $400. The nice part about Alen purifiers is the filters last just about a year and lifetime warranty

[bmitc]

What type of filter is that? HEPA filters are recommended to be changed every few months.

[nerdbaggy]

Yeah they are HEPA and according to the link below it’s good for 12-15 months

https://alen.com/products/alen-breathesmart-75i-hepa-filter?...