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is air cooled
Never mix any of these nutrients together in their concentrated form
and many more home applications
Keep sealed until use
At start-up
17_1/2x23_1/2x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack cloning-and-seed-starting is air cooledNordic 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
