3 ms·
Standard furnace filters, pick the level of filtration you desire/can afford.
by newsclues 4y ago
Standard furnace filters, pick the level of filtration you desire/can afford.
- bombcar 4y agoI've had surprisingly good luck in my area finding brand-new furnace filters at Goodwill for quite cheap. HEPA, too. If you're making your own setup the size doesn't matter as much so that can be a good way to go.
- azth 4y agoI use a furnace filter (3M brand 2200 (merv 13) or even 2800 (merv 14)), and I tape smaller merv 13 filters on the outbound vents in the bedrooms. Those latter ones clearly need changing every couple of months as they become quite dark. So clearly the furnace filter is not sufficient, at least in my case.