11_1/2x21x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack rockwool Elastic wrists for snug

Elastic wrists for snug

quick and handy way to manage the success of your crops

Now available

Loose Media Bags/Bottles: Release at a rate of 1 mite predator per square foot

11_1/2x21x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack rockwool Elastic wrists for snugNordic Pure Custom MERV 14 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