17_1/2x21x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack -monitors-&-timers Retractable

Retractable

It’s safe to use on all plants and food crops and will not harm beneficial insects while successfully eliminating spider mites infestations

Input Voltage:                           100~240VAC

6" flanges for straight through fan-powered supercooling capability

Oil Applicator/Reservoir

17_1/2x21x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack -monitors-&-timers RetractableNordic 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