11_1/2x21x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack ventilation/air-conditioning 4'W x 8'L x 28

4'W x 8'L x 28 3/4"H

and are compatible with other beneficial insects

Air Pressure: Max 25 mm WG (2500 Pa or 10" WG)

synthetic chemicals

Kit includes heavy-duty aluminum fans

11_1/2x21x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack ventilation/air-conditioning 4'W x 8'L x 28Nordic 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