11_1/2x21x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack Water Filtration Fungus Gnats

Fungus Gnats

" The beneficial microbes work in symbiosis with plants

All of these have been combined to encourage plant vigor

The different scales can be selected through two keys on the front panel and two separate LEDs indicate which parameter is being tested

rolled tray edges

11_1/2x21x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack Water Filtration Fungus GnatsNordic 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