17_1/4x19_1/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack growing-media No absorption into the surrounding

No absorption into the surrounding environment

Directions for use

Specifically oversized by 3/8 in to fit any application

109 (and other patents pending)

The HS-1 is the best way to control your dehumidifiers by eliminating the need to control the high-amperage / inrush current associated with dehumidifiers

17_1/4x19_1/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack growing-media No absorption into the surroundingNordic 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