21x23x1 Exact MERV 8 AC Furnace Filters 6 Pack eligible-for-discount Important Note: Almost ALL furnace

Important Note: Almost ALL furnace filters have a different "actual size" than the nominal size printed on the air condition filter

Compatible with 120V controllers and timers

The robust construction of the braided ropes and ease-of-use of the carabiner clips make these a must-have for any indoor setup

– Dimming 0-10V

Contains natural pyrethrins widely used in organic growing because of its rapid breakdown

21x23x1 Exact MERV 8 AC Furnace Filters 6 Pack eligible-for-discount Important Note: Almost ALL furnaceNordic Pure MERV 8 Pleated AC Furnace Air Filters provide exceptional filtration for both home and commercial environments. Each time air passes through a Nordic Pure pleated furnace air filter, lint, dust, pollen, bacteria, pet dander, dust mites, mold spores and other contaminants are removed. MERV 8 furnace filters are comparable to HVAC filters with the rating of MPR 800. While different companies use different scales to measure the air filters