4 ms·
I used box fan filter setup to get through a couple of CA wildfire seasons, but they're loud and take lots of room. I used 4" filters in a triangle with the fan
by oppositelock 4y ago
I used box fan filter setup to get through a couple of CA wildfire seasons, but they're loud and take lots of room. I used 4" filters in a triangle with the fan as the base. This setup is far more effective than a single filter because it makes the fan work better with some air space behind it.
These days, I have a BlueAir 211 in each room. It's the same idea, just professionally made, it's not an eyesore, and it's quiet. Going by my AQI meter, they're also more effective.