16_3/8x21_3/8x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack bloom nutrients heavy duty machines thanks to

heavy duty machines thanks to the Magic Trimmer

space consuming reservoirs that are difficult to transport and relocate

patio areas and greenhouses

growth promoting

delivering powerful air purification with minimal impact on your energy bill

16_3/8x21_3/8x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack bloom nutrients heavy duty machines thanks toNordic 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