>6) If you look for DIY box fan filters, you will find examples with 4-5 filters in a cube shape. 5 filters improves filtration efficiency by ~50%, but costs x5 as much. That's $100-$150 in filters that will last just about as long as one filter while only cleaning the air 50% better. Just invest in a room air purifier unit of the same cost instead and enjoy much cleaner air over an entire year.
The cube box fan configurations with 5 filters cost 5x as much, but how can they not last longer than one filter? Surely each filter must get used up at about 20% of the rate that it would have it if were the only filter attached the fan? So a fan with 5x filters should last about 5x as long. Or is something I'm missing? (Time decay?)
The cube box fan configurations with 5 filters cost 5x as much, but how can they not last longer than one filter? Surely each filter must get used up at about 20% of the rate that it would have it if were the only filter attached the fan? So a fan with 5x filters should last about 5x as long. Or is something I'm missing? (Time decay?)