17_1/2x17_1/2x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack PPE The 4-20 mA output can

The 4-20 mA output can be configured for PID control

With all these properties

It has a low REI (restricted entry interval) and PHI (pre-harvest intervals)

and a mounting plate to install your controller onto the grow tent

• Super compact

17_1/2x17_1/2x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack PPE The 4-20 mA output canNordic Pure Custom MERV 8 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