17_1/2x17_1/2x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack vacuum • Lifetime warranty

• Lifetime warranty

Evening or very cloudy conditions are the best time to apply

filled with thermal insulation material

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17_1/2x17_1/2x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack vacuum • Lifetime warrantyNordic 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