21_1/4x21_1/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack organic Micro™ is formulated to provide

Micro™ is formulated to provide your plants with Nitrogen

What is it

In households

visible residue or harmful effects on plants

21_1/4x21_1/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack organic Micro™ is formulated to provideNordic Pure Custom MERV 13 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