21_1/4x21_1/4x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack spl_hi Wide variety of mounting options

Wide variety of mounting options available for flexible and easy installation

4 Cu Ft LCD F Display

Worldwide sourcing and deliberate design extracted and condensed into an exceptional liquid blend targeted to encourage excellence from your plants

the nutrient delivery system for smaller grows

Product Highlights Mogul base: E39

21_1/4x21_1/4x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack spl_hi Wide variety of mounting optionsNordic 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