17_1/2x17_1/2x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack beneficial microbes Reapply every 7-14 days depending

Reapply every 7-14 days depending need

Tired of choosing between effective weed control and a safe yard

It also serves as a powerful prep machine for working in tandem with your supercritical equipment (see further discussion below)

Tear proof

17_1/2x17_1/2x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack beneficial microbes Reapply every 7-14 days dependingNordic 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