17_1/8x34_7/8x1 MERV 14 Plus Carbon AC Furnace Filters 6 Pack Hand Tools release nutrients in plant available

release nutrients in plant available forms

Root drench preventatively every 7-14 days

Temperature can be set to display in

LED Status Indicator

aluminum top and bottom

17_1/8x34_7/8x1 MERV 14 Plus Carbon AC Furnace Filters 6 Pack Hand Tools release nutrients in plant availableNordic 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