18x28x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack flowering nutrients Whitefly and Mites

Whitefly and Mites

and University of Georgia define the top 1% of all fans tested by two key parameters:

Can be used as often as every watering

With Chlor a’ Clean

18x28x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack flowering nutrients Whitefly and MitesNordic 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