20x28x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack extraction Grow environments require high-capacity

Grow environments require high-capacity

employing a

Download grow data instantly

which makes cleanup easier and less frequent

Entry level

20x28x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack extraction Grow environments require high-capacityNordic Pure Custom MERV 13 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