Greetings, I want to find out a couple of things. I live in the central valley of california(it does not get that cold here), my house is around 1200 square feet. I already have a pellet stove and wood stove in different rooms of the house. I was wondering if a hot water heater would provide enough heat for 3-4 wall radiators(one being a towel radiator)? I am not looking to heat the whole house simply take the bite out of the air. I was thinking to make the heating system a closed one(we already have a hot water system). Also is adding anti freeze to the water a good idea? We are out in the country so LP is our form of gas. Also is there a good and detailed book(with plenty of diagrams) on the subject.