12-26-2009, 12:47 AM
Gary, this is probably obvious to you, but I mention it just in case you haven't thought of it. If you insulate your building in the walls as well as the roof, the a/c will work less, use less electricity, and the temp will stay more comfortable. You could use one of those high tech electronic thermostats, but I prefer a manual one that is a dual heat & a/c, myself. Set your temps to be comfortable to you when operating, and then when you leave, set the a/c to 80 degrees, and the heat to 65. That way the heater and a/c run a minimum of time, but you don't risk finding models warped from the hot weather when you return to the train building after a hot day. If you are putting in a ceiling so that the building has an attic, an attic mounted exhaust vent will help too. They even have exhaust fans for the attic that are solar powered.