Description
Important Note: Almost all furnace air filters have a different Actual Size (the exact dimensions) than Nominal Size (the name)
Improved design
Starting Pulse (Peak KV) - 4 - 5
and 55 gallon drums
20x21_1/2x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack Dispensary Important Note: Almost all furnaceNordic 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