17_1/4x29_1/4x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack rockwool For example

For example

Please note

Long Battery Life - The Checker has an exceptional long battery life of approximately 1000 hours

SNS 203's concentrated active ingredients attack fungus & algae and cause pests to dehydrate and dry up

17_1/4x29_1/4x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack rockwool For exampleNordic Pure Custom MERV 8 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