21_1/4x23_1/4x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack Ventilation/Air Conditioning Anti-Drip Properties

Anti-Drip Properties

Carbohydrates supply microbes with a vital source of food they need to thrive in your plants’ root zone

DERIVED FROM: Ammonium Nitrate

Sold in lengths of 500 feet per roll

The Dual-Purpose Hybrid tumbler has been extensively tested and found to trim wet product better than our old 1/8” Wet Tumbler and dry product better than our old 1/4″ Dry Tumbler

21_1/4x23_1/4x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack Ventilation/Air Conditioning Anti-Drip PropertiesNordic Pure Custom MERV 12 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