These filters remove odors very well which is why I bought them. The 20x20 size is the same as the box fan. When you attach it to the inlet side of the box fan and turn it on, it filters both dust and odors from the air. I use this in my office which is new and has a lot of weird construction smells (glue etc). Even if you only do this for a relatively short time, it makes a pretty big difference. I don't know how long they will last but these 6 packs should last quite a while and will do a lot of good for my air.
NANPU Air Drying System With Double Filters And Pressure Regulator Combo For Clean And Controlled Air Supply
18 Review
NANPU 1 FRL Air Filter Regulator Lubricator Combo With 0-150 Psi Gauge, 5 Micron Brass Element, Poly Bowl & Semi-Auto Drain - Metal Bracket Included
20 Review
NANPU 1/2" NPT Air Drying System - 5 Micron Particulate Filter, 0.01 Micron Coalescing Filter, Air Pressure Regulator Combo - Semi-Auto Drain, Poly Bowl W/Metal Gauge
23 Review
NANPU DFR-02 1/4" NPT Air Drying System - Double Air Filters, Air Pressure Regulator Combo - Semi-Auto Drain, Poly Bowl
20 Review