I am whatever is less than a rookie at this. I have a hot water boiler that heats my house. I also have a small hot water unit heater in my garage that I just replaced that is supplied hot water by the boiler. The original unit heater in my garage cracked in freezing temperatures. I do not need the garage heated all of the time but I do not want the new heater to have issues with freezing water. I don't know if this is possible, but I was wondering if I could use an aquastat or aquastat relay to safe guard myself from having these pipes freeze? Ideally I would use a thermostat to control heat when I want to have the garage warm enough to work in during the winter. When I don't need the garage heated, I would turn the thermostat way down and use an aquastat to control water temperature going out to the garage to keep the pipes from freezing. Is this possible? What components would I need? Any help in how this would be wired would be appreciated also. Thanks
The short answer is that your boiler can be wired to do whatever you want it to do. My recommendation is to hire a professional that is familiar with wiring your type of boiler. There are so many variables that aren't included in this question. Is it a gas, oil or electric boiler? Are you using just circulators or zone valves also? Are you using a zone control such as a Taco SR506 control? What model aquastat? Is it a cold start control or low/high limit aquastat? What kind of thermostat? Have you considered smart controls that utilize an outdoor sensor, such as the Logomatic controls on a Buderus boiler? How many zones do you have? With all these unknowns, there is over 100 ways to wire a boiler. Good luck! TomTheTechnician
