21_1/4x21_1/4x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack propagation trays Each air filter box accepts

Each air filter box accepts standard MERV filter replacements that slide into the inner chamber’s filter slot

and will provide the nutrients necessary for vigorous and productive plants

Temperature Range:                             0-59

This Eco-friendly AC filter is a simple way to start minimizing your carbon footprint

21_1/4x21_1/4x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack propagation trays Each air filter box acceptsNordic 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