20x22_1/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack harvest-solution benefitting from the use of

benefitting from the use of 100% of the carbon available and effectively extending the units’ life span

Use the Dutch Pot to make your own hydro system

health and production by reconnecting container-grown plants to the Earth's energy

Storage: Stable in freezing and adverse environmental conditions

favored by thousands of horticulturists—but with the added feature of curved blade tips

20x22_1/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack harvest-solution benefitting from the use ofNordic 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