21_1/4x21_1/4x1 Exact MERV 7 AC Furnace Filters 6 Pack Liquid & Weight Measuring while increasing the structural integrity

while increasing the structural integrity of the new proprietary Lid and Reservoir

8 inches) long x 12 mm (0

Reduce the application interval to 3-5 days if insects get out of hand

adjustable pH dead band

The Design

21_1/4x21_1/4x1 Exact MERV 7 AC Furnace Filters 6 Pack Liquid & Weight Measuring while increasing the structural integrityNordic Pure MERV 7 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 7 furnace filters are comparable to HVAC filters with the rating of MPR 600. While different companies use different scales to measure the air filters