21_1/4x23_1/4x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack harvest-solution There is no programming required—it

There is no programming required—it is easy to set and operate

Increase Yields While Decreasing Fertilizer & Water Use With Soil Activator

Bio-tone biologically enhances Espoma's natural plant food to ensure superior plant growth

The parasitoid larvae feed on developing whiteflies for around three weeks until reaching adulthood

133 x 28 x 38 cm (52 x 11 x 11 in) Dimensions

21_1/4x23_1/4x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack harvest-solution There is no programming required—itNordic Pure Custom MERV 7 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