21_1/2x23_3/8x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack lighting Improved “re-wettability” able to more

Improved “re-wettability” able to more easily increase water concentration in the substrate

fishing hook and 4 X match sticks

- Transluscent housing

Temperature and humidity control to monitor and adjust temperature and humidity set points 24/7/365

use a tape measure to determine the exact width (short side) and exact height (long side) of your current air filter

21_1/2x23_3/8x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack lighting Improved “re-wettability” able to moreNordic 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