17_1/2x21x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack rockwool For proper function the Ice

For proper function the Ice Box must be installed on the exiting air duct flange

Shipping Weight (case): 17

Use the 220 micron to get more pollen

and is an ideal choice for developing starts into vigorous

This beast comes equipped with 2-21 inch cutting reels

17_1/2x21x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack rockwool For proper function the IceNordic 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