16x20x4 (3 5/8) Furnace Air Filters MERV 8 Pleated Plus Carbon 6 Pack Travel Bags & Backpacks ARC CMH systems are available

ARC CMH systems are available with your choice of 3100K or 4200K lamps and are offered in 208-240V

Chironomus plumosus

Both electrodes are compatible with existing models of HI9814

waxed cardboard

A tear-resistant liquid and particulate barrier helps protect against blood penetration

16x20x4 (3 5/8) Furnace Air Filters MERV 8 Pleated Plus Carbon 6 Pack Travel Bags & Backpacks ARC CMH systems are availableImportant 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