21x23_1/4x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack X Nutrients bloom which we believe allows plants

which we believe allows plants to produce more energy

It does this AUTOMATICALLY by using a small IR (infrared) emitter / sending unit that will send the same signal to the mini-split

Pressure Compensating Spray Stakes

* Water tank or drainage pipe

and comes with

21x23_1/4x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack X Nutrients bloom which we believe allows plantsNordic Pure Custom MERV 12 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