21_1/4x23_1/4x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack water-pumps-&-irrigation-supplies The Max-Fan® Pro Series is

The Max-Fan® Pro Series is even more efficient and stronger than the original Max-Fan® design

Patented worldwide: US

Nordic Pure 16x24x4 MERV 13 Plus Carbon air filters are made of electrostatically charged synthetic materials with an added flat panel infused with activated charcoal that will attract and capture most airborne particulates in your home

and green spectral energy optimizing plant growth and yield

allowing you to dip directly into your favorite concentrates for smooth

21_1/4x23_1/4x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack water-pumps-&-irrigation-supplies The Max-Fan® Pro Series isNordic 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