21_1/4x23_1/4x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack water-pumps-&-irrigation-supplies 0-3999 µS/cm

0-3999 µS/cm

Patented worldwide: US

Nordic Pure 16x24x4 MERV 13 Plus Carbon air filters are made of electrostatically charged synthetic materials with an added flat panel infused with activated charcoal that will attract and capture most airborne particulates in your home

Works in both salt water and fresh water and has a heating range from 66°F to 90°F

Japanese Razor Sharp Quality

21_1/4x23_1/4x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack water-pumps-&-irrigation-supplies 0-3999 µS/cmNordic 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