20x21_1/2x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack Lamps Nordic Pure 14x24x2 MERV 8

Nordic Pure 14x24x2 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

They are white until they feed after which they take on the coloration of their prey (usually red or brown)

The active ingredient in Thymox Control Organic (thyme oil) has no known resistance

lamp failure protection

min/max recall

20x21_1/2x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack Lamps Nordic Pure 14x24x2 MERV 8Nordic Pure Custom MERV 14 Plus Carbon air filters are made based on the actual measurements so be sure to measure your current filter to get the EXACT dimensions before ordering. As with all Nordic Pure filters, the effective life of your filter depends on the environment in which you live. We recommend changing 1 and 2 filters every 30 90 days. Our 4, 5 and 6 inch thick filters could last up to 6 months. EXACT MEASUREMENT: Furnace and air condition