17_1/4x23_1/4x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack -monitors-&-timers 16’ or 20’ lengths

16’ or 20’ lengths

It does not affect any beneficial bacteria within the soil or in your garden

Target Prey: Broad Mites

Place the probe in the solution and wait until it is calibrated

The name says it all

17_1/4x23_1/4x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack -monitors-&-timers 16’ or 20’ lengthsNordic 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