12_1/2x23_1/2x1 MERV 8 Plus Carbon AC Furnace Filters 6 Pack Electrical Components Lifetime L90 >54

Lifetime     L90 >54

3 GPM Flow Rate

Easy to mix

Pumping raw air into the nutrient solution

DOES NOT INCLUDE THE BULB

12_1/2x23_1/2x1 MERV 8 Plus Carbon AC Furnace Filters 6 Pack Electrical Components Lifetime L90 >54Nordic Pure Custom MERV 8 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