Welcome to Capitol Boiler Works

Capitol Boiler Works, Inc. has served the Mid-Atlantic Region since 1936. We are available to handle a wide range of HVAC, plumbing, mechanical, electrical, and heating requirements. Whether it is a custom design-build project, emergency or routine repairs, a planned equipment retrofit, or equipment rebuild that you need, we will respond promptly and with the right technician or sales engineer for the job.


Our Promise and Values

The values and principles upon which Capitol Boiler Works was

established have not changed in the course of the past eight decades. An unbridled commitment

to excellence, training and unparalleled customer service continues to be Capitol Boiler Works

corporate hallmarks.




Product Lines

Johnston Boiler
Industrial Combustion