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Use 4" thick furnace filters. They cost less than specialized air purifier filters and flow a lot more air.
by driverdan 6y ago
Use 4" thick furnace filters. They cost less than specialized air purifier filters and flow a lot more air.
- ska 6y agoThey don't filter the same things, which may or may not be an issue for you.
- Scene_Cast2 6y agoDo they not? They have the same ratings scale, based on filtering certain particulate sizes.
- Der_Einzige 6y agoThat's BS. Look at the MERV rating. MERV 14 and above filters out increasingly large quantities of particles at the sizes of COVID virus particles and pollen. 4 inch thick furnace filters can easily be rated above MERV 16 (I run a MERV 16 filter in my home). For most peoples purposes, they are almost as good (and far cheaper) than HEPA.
- ska 6y ago> For most peoples purposes, they are almost as good That's what "may or may not be an issue for you" meant.