16x20x4 (3 5/8) Pleated MERV 15 Air Filters 2 Pack chillers-heaters-and-purification DERIVED FROM: Magnesium Phosphate

DERIVED FROM: Magnesium Phosphate

000 gallons — equivalent to 30 GPD for a full year (365 days)

Operating temperature: -40˚F-176˚F (-40˚C-80˚C)

See the usage rates below

It can be mixed with potting soil

16x20x4 (3 5/8) Pleated MERV 15 Air Filters 2 Pack chillers-heaters-and-purification DERIVED FROM: Magnesium PhosphateImportant Note: Almost ALL furnace filters have a different "actual size" than the nominal size printed on the air conditioner filter. It's best if you measure your air filter for the EXACT size and compare it to our "Actual Size" and then you can be sure your A C air filter fits! With the 4" and 5" air filters there is a wider variance between the nominal and actual size depending on the manufacturer. If you are replacing a 4 3 8 depth 16x20x4 filter