21_1/2x23_5/16x1 MERV 14 Plus Carbon AC Furnace Filters 6 Pack Emitters extruded aluminum alloy chassis with

extruded aluminum alloy chassis with integrated heatsink for longevity and passive

or individually

Spectrum : UV

like ceramic bulb recepticales

21_1/2x23_5/16x1 MERV 14 Plus Carbon AC Furnace Filters 6 Pack Emitters extruded aluminum alloy chassis withNordic 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