21x23_1/4x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack harvest-solution will allow you to inspect

will allow you to inspect

Prevents freezer burn

Temperature or flow totalizer output

- 45 micron bag

pets and people

21x23_1/4x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack harvest-solution will allow you to inspectNordic Pure Custom MERV 8 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