21x21x1 MERV 10 AC Furnace Filters 6 Pack Bio-Fertilizer Numbers of control channels- 3

Numbers of control channels- 3

3 ft long heatsink for a wider spread

Now includes mogul socket and 15' cord set

strong cell walls

A curved drainage grid with wider channels simplifies cleaning while newly engineered corner gussets allow for greater support

21x21x1 MERV 10 AC Furnace Filters 6 Pack Bio-Fertilizer Numbers of control channels- 3Nordic Pure MERV 10 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, smoke particles, virus carriers, allergens and other contaminants are removed. MERV 10 furnace filters are comparable to HVAC filters with the rating of MPR 900 1000. While different companies