20x22_1/4x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack -monitors-&-timers Features include 13

Features include 13

This organic liquid has a well-balanced NPK of 2-3-1 to give you a complete fertilization profile

Nordic Pure 20x20x4 Plus Carbon Air Filters MERV 15 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

Many years were spent developing a blend of Ona and various suspension elements to result in a product that has excellent dispersion qualities

This line of time-tested activated carbon air filters sets the standard for long life

20x22_1/4x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack -monitors-&-timers Features include 13Nordic 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