20x20_1/2x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack plant-support With the increasing problems of

With the increasing problems of bacteria and diseases affecting plants

Certifications: UL-rated for damp locations

This special boot helps prevent damage due to accidental impact

plants have more vigor

20x20_1/2x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack plant-support With the increasing problems ofNordic 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