For obvious reasons, we are thinking of switching from oil to natural gas to
fire the furnace for our steam radiator system in a six-unit coop apartment
The furnace is fairly new. The question is, would we have to replace the
entire furnace, or could we simply convert the existing one for use with
Depends. First of all, you don't have a furnace. Furnaces heat air. Boilers
heat water or make steam. Since you state you have steam heat, it is safe
to assume you have a boiler.
Boilers consists of two main sections. The burner and the heating chamber.
Most can be had from the factory with a choice of fuels or even dual fueled.
There is a very good chance you can convert to gas simply by changing
burners, installing the proper piping for the gas, then remove the oil tank.
For more details and cost estimates, call you boiler dealer.
If the is a single boiler that serves a building with six apartments, I
expect it's a commercial sized unit. If so I would strongly recommend
replacing the burner with a dual fuel unit as opposed to a gas only
unit. Cost difference will be small and you don't lock yourself into
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