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Green Energy Engineering, Inc., is dedicated to saving energy, saving money, reducing your carbon footprint (carbon dioxide emissions), and saving the Earth through the cost-effective utilization of Mother Nature's limited energy resources. More...

Eric H. Coffin, P.E.

"The Engineer's Engineer"

For the serious engineers who are truly interested in "continuing education,' Eric's seminars satisfy that demand...


Green Energy Engineering, Inc. provides process control system development, review, engineering, design, and startup. For a full list of control services offered see this page.

We have 35 years of experience in boiler control, steam system control and monitoring, as well as experience in chemical plants, pulp mills, and oil refineries. See list of past control jobs here.

We troubleshoot existing systems and can offer solutions and enhancements as well as design control schemes from scratch.

Boiler control involves quite a few control loops that go way beyond the single loop standard of transmitter, controller, and valve. Boiler control is feed forward, cascade and parallel functions. Because of the complexity boiler controls are typically represented by SAMA symbols that are a language onto themselves and are explained on another page.