13x21_3/4x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack nutrient-combo high quality ingredients

high quality ingredients

Ascorbic Acid

can be wiped out with one application

Color Temperature: 3300k

How To Use

13x21_3/4x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack nutrient-combo high quality ingredientsNordic 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