I moved from Europe to USA 4 years ago and I was wondering if it's possible to combine forced air heating with the heating that uses radiators.
My idea is to use the furnace for forced air to heat up water for radiators at the same time it heats up air for forced heat. Use it to heat up air and also function as a boiler. In that case I can increase the efficiency of the heating.
Next question is if I can use the same chimney for the furnace that uses wood with the furnace that uses gas(forced heat)? Where I'm from originally you are not allowed to use the same chimney but in USA I talked to a professional and he said that's ok but I'm not sure if I can believe him.