9_3/4x23_3/4x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack Air Purification which is a key component

which is a key component of our Pure Green furnace filters with their low-pressure drop rating

Great for environmental and agricultural testing

Side panels slope from 16-inches high at the back to 12-inches high in the front

The pyrethrins attack the nervous system of the insect while the B

9_3/4x23_3/4x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack Air Purification which is a key componentNordic 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