12_3/4x20_3/4x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack Extension give you true control of

give you true control of what your plants need

PPF - 2345 μmol/s

• Onboard dimming knob

exhaust fans

with a 7mm upward lip

12_3/4x20_3/4x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack Extension give you true control ofNordic Pure Custom MERV 14 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