Is there anything to consider when buying a farm house that has a boiler system? Is is not new but it is not the original system. Is it cheaper or more expensive than a gas furnace? This is a 1682 square foot home with four bedrooms. And do they work as well as a furnace? I am not familiar with these types or heating systems. Any info would be appreciated so I can be armed with information when I look at the home. Do the radiators get hot to the touch when they are on?