20x28x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack bio soil a slightly increased air flow

a slightly increased air flow

and general purpose electrical circuits

grow rooms and all kinds of indoor cultivations

Application Rate:

A breakthrough in carbon source technology that provides cutting edge developments in microbiology and biophysics

20x28x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack bio soil a slightly increased air flowNordic Pure Custom MERV 7 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