I have a 2 story colonial about 2500 sq.ft 18 years old, with an 18 x 18 familyroom addition on the back. I have a small boiler that provides in floor radiant heat for the addition, and indirect hot water storage tank for the 2 1/2 baths and kitchen. The gas fired hot air furnace needs to be replaced, and my question is, should I replace the small boiler with a unit that can heat the whole house, in floor radiant in addition ,plus radiant heat exchanger in new hot air furnace? My thinking is saving money long term with more efficent radiant, and only one piece of equipment burning gas instead of 2.
thanks for any imput.