17_1/2x21x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack Monitors & Timers spray at first sign of

spray at first sign of infestation or when conditions are favorable for pest buildup

This greatly reduces the air conditioning required to maintain the growing environment at desired temperatures

which prevents jamming

Programmable controller with corded probe

and an additional power outlet for the IceCAP supplemental cooling accessory

17_1/2x21x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack Monitors & Timers spray at first sign ofNordic Pure Custom MERV 10 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