17_1/8x26_1/2x1 MERV 8 Plus Carbon AC Furnace Filters 6 Pack Promote Max Watts 75 66 53

Max Watts 75 66 53

undervoltage protection

Increase porosity in growing media allowing more air flow and drainage

Used to turn on equipment from other power circuit

The rest is the smallest

17_1/8x26_1/2x1 MERV 8 Plus Carbon AC Furnace Filters 6 Pack Promote Max Watts 75 66 53Nordic Pure Custom MERV 8 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