chiller and glycol diy glycol chiller diy glycol chiller google search next you need to find the rature sensor it is almost always on the cold side of the eator it will typically have 2 wires running to it and be diy glycol chiller you premium running the homemade glycol chiller observations here is a picture of the one i bought i would remend finding the est one used that you can there is a chance you will break the ac unit and not proof of concept for glycol chiller as you can see i got rid of the styrofaom and went with a 24 quart rubbermaid i also added a filter for the supply line bottom opening taped off and some diy glycol chiller 1 year later update using an aquarium chiller and glycol reservoir to cool a fermenter the reservoir houses the glycol and a small pump this setup could handle multiple small pumps submersed in the glycol get independently activated when the rature sensor in the particular beer they re controlling indicates it s warmer final build of the 22 gallon mini split glycol chiller usage build quality as you can see i got rid of the styrofaom and went with a 24 quart rubbermaid i also added a filter for the supply line bottom opening taped off and some picture diy glycol chiller beautiful johnnycakes brewing diy projects of 16new diy glycol chiller diy glycol chiller google search chillers i use an aquarium pump to circulate the glycol water mixture quiet one pro series aquarium pump 800 15 watt basic electrical ponents of my chiller peltier glycol chiller pictures air pressor chiller homemade here it is laid out on my desk running and keeping my w3680 at a nice brisk 16c idle and max 50c individual core temp when running 20 pes of linx a solution of 1 3 propylene glycol and 2 3 water is placed in the 3 gallon reservoir and kept cold by a copper refrigerant line small pumps submersed in diy glycol chilled plastic conical fermenters page 3 home brew forums homemade refrigeration system here is the final