20x20x4 (3 5/8) Furnace Air Filters MERV 10 Pleated Plus Carbon 2 Pack Dispensary Nordic Pure 16x24x2 MERV 7

Nordic Pure 16x24x2 MERV 7 Plus Carbon air filters are made of electrostatically charged synthetic materials with an added flat panel infused with activated charcoal that attracts and capture most airborne particulates in your home

The EL1 can control 500 max repeater bus fixtures and 40 max single bus fixtures without a booster

Black side seals in light

Nordic Pure 18x18x2 MERV 8 Plus Carbon air filters are made of a dual material where the MERV rated material has been fused together with a carbon layer

top-grade BPA-free black plastic LARGE SIZE – With an outer dimension of 21

20x20x4 (3 5/8) Furnace Air Filters MERV 10 Pleated Plus Carbon 2 Pack Dispensary Nordic Pure 16x24x2 MERV 7Important 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