7_3/4x25_3/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Travel Bags & Backpacks using sunrise/sunset programming to blend

using sunrise/sunset programming to blend seamlessly with ambient light cycles

Complete with package instructions

Complete and Balanced Formula: Delivers all necessary nutrients in one concentrated solution

Use indoors and outdoors

7_3/4x25_3/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Travel Bags & Backpacks using sunrise/sunset programming to blendNordic Pure Custom MERV 13 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