25x30x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack Synthetic Pro Edition Instantaneous readings down to 1

Instantaneous readings down to 1 ppm

There is an additional ingredient in this formulation that draws the disabled insect down into the liquid

and monitor

cleaners or oxidating agents

One case of (8) GC 30 makes 2

25x30x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack Synthetic Pro Edition Instantaneous readings down to 1Nordic 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