21x23_1/4x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack Commercial Lighting Color temperature: 3

Color temperature: 3

and Whiteflies (Aleyrodoidea)

simply pull out 3 mm (1/8") to clear the clogging which will improve response time and stability

5cm) Above Canopy

21x23_1/4x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack Commercial Lighting Color temperature: 3Nordic Pure Custom MERV 8 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