23x25x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack new releases Factory Calibrated: The COM-100 meter

Factory Calibrated: The COM-100 meter is calibrated with a 1413 µS solution

Simplifies Design Layout Reduces system costs

over rolling benches or even in tents

The mats heat compressed to ensure compactness and consistent finish

Growers can use the blocks for vegetative growth for plants going into larger containers

23x25x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack new releases Factory Calibrated: The COM-100 meterNordic 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