28x28x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack Cloning & Seed Starting -Maintains high CFM ratings

-Maintains high CFM ratings

XTREME TEA BREWS are an easy to use

you will realize the advantage of the simplicity of this uniquely easy-to-use

tool-free for cleaning

28x28x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack Cloning & Seed Starting -Maintains high CFM ratingsNordic 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