12_3/4x20_3/4x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack ventilation and ducting mosquitoes and other insects without

mosquitoes and other insects without the use of harmful chemicals found in some flea collars and topical applications

(Color Rendering Index) of 80-85

Description: Patented

adjustable duct ports (now up to 10")

the AS35FP complements non-forced air heating sources and other specialty heating systems

12_3/4x20_3/4x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack ventilation and ducting mosquitoes and other insects withoutNordic 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