21x23_1/2x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack meters-&-solutions and provides up to 48%

and provides up to 48% additional high quality light

grain spawn bags

Non-flammable

These trays are small enough to fit almost anywhere

21x23_1/2x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack meters-&-solutions and provides up to 48%Nordic 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