17x26x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack rock-bottom Transition varies based on conditions

Transition varies based on conditions and UV levels

Calcium Nitrate and Magnesium Nitrate

• Material: PP Plastic

000 hour life rating and is UL listed

Superior Wetting of the Soil Mix

17x26x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack rock-bottom Transition varies based on conditionsNordic Pure Custom MERV 12 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