21x23_1/4x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack soil nutruient Maintain operational excellent and extend

Maintain operational excellent and extend equipment life

Root Knot and more)

You should always measure your current filter or the housing to make sure the actual size correlates with the filter you are ordering

This Product Controls These Pests or Diseases: Greenhouse Whitefly (Trialeurodes vaporariorum)

21x23_1/4x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack soil nutruient Maintain operational excellent and extendNordic 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