10x12x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack microbes Successful calibration indicator is displayed

Successful calibration indicator is displayed on screen

TDS Resolution: 10 ppm

Its multi-outlet divider accepts 0

The Xtrasun DE 240V ballast features rugged build quality

These predatory mites consume egg

10x12x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack microbes Successful calibration indicator is displayedNordic 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