Smart AC Automatic Air Conditioner Cooler System Evaporative Cooling Kit Saves Energy  reduces the run-time of Air Conditioner compressor Easy to Install  Plumbs to existing water source (garden hose or faucet) and wires up to the existing AC control wire. No programming required! Automatic Operation  uses power from the ACs existing 24 VAC thermostat control to operate (wiring instructions included) Small Droplet Size  average 100 micron droplets allows for evaporation without over wetting surrounding areas Low Water Usage  uses two 1.8 gallon per hour foggers (3 per system), and these operate only while the AC compressor operates