20x23x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack Grow Light Ballasts Carbon Quantity x Carbon Quality

Carbon Quantity x Carbon Quality = Filter Capacity

Simply roll out the protective film to safeguard carpets for up to 45 days

Whole-house filter or stand alone (with optional garden hose connection kit HL26010)

6' power cord

The thin shutter blades automatically open when the duct fan runs and closes when not in use

20x23x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack Grow Light Ballasts Carbon Quantity x Carbon QualityNordic 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