17_1/2x23_1/2x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack spl_centurionpro • Contains fulvic and humic

• Contains fulvic and humic acids

This system focuses 20% more of the light to the target area than their nearest competitor’s system

• Water resistant design

• Cuttings: Add 1-2 teaspoon(s) per gallon of water

17_1/2x23_1/2x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack spl_centurionpro • Contains fulvic and humicNordic Pure Custom MERV 7 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