22x30x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack food-&-water-storage 3" wide drill access points

3" wide drill access points on all four walls for installation of inlet and outlet fittings

and one porthole cover—a great value at an affordable price

Easy to use touch screen designed for temperature and humidity control

to help save time during a hot swap

22x30x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack food-&-water-storage 3" wide drill access pointsNordic 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