i am looking to buy a home built before 1890 and it MUST remain as is with it's natural gas boiler. how efficent is this system v's using forced air heating. keep in mind this home is 4800 sq ft and is all plaster walls and hardwood floors. i am sure i could help by using the 3 fireplaces but i am still concerned about the boiler having never seen one before.
The economical efficiency of your current boiler depends on its age, current condition and if was sized correctly for your home and current radiators. New gas fired boilers can reach 98.5% A.F.U.E which is comparable to any forced air system. Comparing hydronic heating to forced air as far as comfort the boiler system is typically much more comfortable, especially in older looser homes. Forced air does give you the benefit of sanitizing and cleaning the air,cooling it adding moisture and replenishing oxygen levels. Hope I haven't confused you. Good Luck.
