20x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 13 Air Filters 1 Pack lighting_accessories Micron sizes:

Micron sizes:

and commercial growers

Active Air Premium Ducting is perfect for the air-cooled reflectors in your grow room

• Adjustable float ladder and emergency shut-off valve

allowing clones to grow healthy and resilient

20x20x5 (4 3/8) Honeywell/Lennox Replacement MERV 13 Air Filters 1 Pack lighting_accessories Micron sizes:Important 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. We also carry 4 7 8 and 5 1 4 inch depth filters,