20x22_1/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack garden-accessories Four way dimming feature 60%

Four way dimming feature 60%

Recirculating: Mix 2-3 tsp

and Tablespoons

ECM port : 2 Groups

NOTE: Sunblaster light fixture sold separately

20x22_1/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack garden-accessories Four way dimming feature 60%Nordic Pure Custom MERV 13 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