13x23x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack Trimming Shears It’s the simple

It’s the simple

which prevents further spore development

High Output and Improved Spectrum

Bluelab pH Controller Connect

Use of External B-Lite Master Zone Controller (0W - 1000W)

13x23x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack Trimming Shears It’s the simpleNordic 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