16_1/4x21_1/4x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack complete-systems The black plastic helps prevent

The black plastic helps prevent the growth and spread of algae

The FloraFlex manifold system takes seconds to put together and/or take apart

Whole-house filter or stand alone (with optional garden hose connection kit HL26010)

fungicides

Lithium ion (Li-ion) batteries are an awesome technology constantly improving and that is why they are very expensive

16_1/4x21_1/4x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack complete-systems The black plastic helps preventNordic Pure Custom MERV 8 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