17x27x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack ventilation molds and other plant diseases

molds and other plant diseases

thrips (Thysanoptera)

and disease resistance

-47''H x 31

greenhouses and storage sites

17x27x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack ventilation molds and other plant diseasesNordic 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