20x20x4 (3 5/8) Pleated MERV 12 Air Filters 2 Pack control system Important Note: Almost all furnace

Important Note: Almost all furnace air filters have a different Actual Size (the exact dimensions) than Nominal Size (the name) printed on the air conditioning filter

Big Rootz is carefully formulated to meet the needs of professional growers

resulting in a more bountiful harvest and improved aroma

Schaefer Versa-Kool High Velocity Greenhouse Fan

8Lm±5%@AC120V 111756Lm±5%@AC240V 110832Lm±5%@AC277V

20x20x4 (3 5/8) Pleated MERV 12 Air Filters 2 Pack control system Important Note: Almost all furnaceImportant 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 20x20x4 filter