Hi everyone it's been a while since I visited, I have a question about a project I want to do, I am making a fermentation fridge the can control heat and cool to around 20° to 25°, I was looking at eBay on the evaporator heat/cool fan, I would upload a pic but can't figure it out, I'm thinking having lines to a 12v pump going into a fridge for cooling and have line to a boiler for heating, any help if it would work or any other idea better or changes..