13x23x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack Water Filtration Economic lighting choice (long average

Economic lighting choice (long average life

Open design for maximum light output

- 4-hour REI

in which every key detail has already been considered and incorporated into our professional design

13x23x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack Water Filtration Economic lighting choice (long averageNordic Pure Custom MERV 12 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