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A history of excellence in manufacturing design.

In the mid-1800's, the Scotch Marine boiler design was introduced to the American shipping and railroad industries. This horizontal tube, three pass, belly flue design boiler quickly proved to be a high efficiency, low maintenance work horse. Within a few years this boiler design gained a very favorable track record and was adapted for use in the American manufacturing industry.

In 1937, the FP series Dynatherm boiler, a Scotch Marine design boiler, pioneered by Lehigh University in conjunction with Bethlehem Foundry and Machine Corp., Bethlehem, PA, was introduced for residential use. The Dynatherm FP series boiler, since its introduction, has given homeowners what                    The Dave Zuck family home            industry has known for decades: high efficiency,         Comforted by a 1965 FP series with 85% efficiency simplicity of maintenance and longevity of service.

Engineered to use every drop of your precious heating fuel (oil, natural gas, or propane), the Bethlehem Dynatherm Boiler has been the leader in efficiency and longevity.  Our standard of excellence in boiler design and construction is as exacting today as it was when we first began production in 1937.  With a Limited Lifetime Warranty on all new boilers, they are built to last and are still heating homes after many decades of operation.

Uniquely different from an all cast iron or all steel boilers, Dynatherm utilizes the qualities of both materials.  The cast iron front and rear heads are designed to hold the heat as they transfer it into the steel heat exchanger.  There the gasses are transferred efficiently into the water body.  Then the gasses are forced down to the belly, allowing all the heat generated to rise back through the system before exiting the flue, giving you constant, reliable, comfortable home heat.

Our Dynatherm family is dedicated to manufacturing and delivering the best heating equipment available. We are small enough to give you personal attention and service; large enough to offer you a parts inventory covering almost every maintenance and replacement part for models manufactured from 1937 to the present.

Dynatherm provides the finest home heating equipment available today, along with complete dealer/homeowner support - a combination that can't be beat!  Give your family the warmth and comfort they deserve with a new Dynatherm. Let our Dealer show you how a new Dynatherm boiler can save you money this year - and thousands of dollars in the years ahead.

Dynatherm - a lifetime of comfort