23x25x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack nutrients and supplements Fits in the top duct

Fits in the top duct of the Carbon Air Unit

sulfate of potash

it neutralizes odors at the source

release Green Lacewing early in the season when pest numbers are low

fungicide and algaecide on hard

23x25x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack nutrients and supplements Fits in the top ductNordic Pure Custom MERV 10 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