Green Mountain boilers are a trusted choice for residential steam heating, combining cast iron durability with straightforward, reliable operation. Oswald Supply stocks the full Green Mountain GMGS Series, including the GMGS299E with 299,000 BTU input and 82% AFUE efficiency.
At the heart of every Green Mountain boiler is a cast iron heat exchanger with cast iron push nipples, both materials expanding at the same rate under heat to maintain a watertight seal over the long term, without relying on gaskets. The atmospheric chimney vent design with integral draft hood and low profile compact construction makes it a practical choice for tight or low clearance installations.
Bronx, NY 10474
