17_1/4x17_1/4x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack Electrical Components Product Name: Insect Frass

Product Name: Insect Frass

as well as sucking insects

meaning a customized ramp-up / ramp-down can be used

It can also be used as a preventative control of broad mites

6"-18" for bloom

17_1/4x17_1/4x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack Electrical Components Product Name: Insect FrassNordic 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