20x20_1/2x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack Air Filter No returns allowed

No returns allowed

Ergonomic design and comfort lock reduce stress to the hand

EC or TDS levels rise either above or Below (user selected) that set-point

outside in fields or in greenhouses

How Is ECOWORKS EC Different from Other Neem Oil and Azadirachtin Products

20x20_1/2x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack Air Filter No returns allowedNordic 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