15x24x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack timers-and-instruments Each layer of material is

Each layer of material is bonded to polyurethane for strength and durability and has a inner layer of insulation to prevent conductive heat flow

Automated filter change warning

(2) 10' covered collectors with Drip Cap

soil and many other environments

15x24x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack timers-and-instruments Each layer of material isNordic Pure Custom MERV 7 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