21_1/4x21_1/4x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack lighting not only for the silicic

not only for the silicic acid content

These pumps have low suction capability down to a 1/16 in

The Outdoor Pack contains Bio-Bloom

and extremely high efficiency

Volume: 5 Gallon

21_1/4x21_1/4x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack lighting not only for the silicicNordic Pure Custom MERV 10 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