W.H. Demmons is a leading design-build-maintain engineering firm focused on reducing your energy costs through proven innovative engineering, design, and installation solutions. Our history began in 1914, with the creation of Demmons Roofing, which offered quality commercial roofing services to clients through the Northeast. Exactly eighty years later, in 1994, the company merged with Maine Air Conditioning, which was founded in 1974, to expand the company into commercial HVAC solutions.

With the acquisition of Maine Air Conditioning, W.H. Demmons became a global leader in the HVAC innovation and technology industry, after having completed its first geothermal building in the 1990s.

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Our Team

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Douglas began his career in 1976, when he joined the Carrier Corporation. Over the next 40 years, he went on to work for companies around the world, from Galson & Galson Consulting Engineers to Munters Cargocaire. In 1986, he became a partner at W.H. Demmons, Inc., and eventually moved into the position of owner and president.

Services

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Rather than just design HVAC systems, W.H. Demmons is a full-service design-build-maintain company. We work with our clients to create a customized HVAC solution, which we can then properly install. To ensure the system is operating at up-to-the-moment maximum efficiency, we will maintain the HVAC unit(s) using cutting-edge control systems.

Safety

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It's easy to forget about the air we breathe. It's a subconscious act: inhale, hold, exhale; repeat. But the moment air quality deteriorates for any reason - excessive particles, chemical fumes, biting cold or burning heat - breathing becomes a safety concern. It can even become deadly. It's the driving force behind every project, because we understand that we create more than cost-effective solutions - we're creating life-sustaining environments.Humidity, airflow, temperature regulation, these factors must be carefully manipulated, otherwise one's safety is at risk, and our professional staff has the experience and expertise to ensure every project meets and exceeds safety standards.

Careers

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W.H. Demmons is looking for experienced construction and support staff who share "can-do" work ethic and who will thrive in our fast-paced, demanding culture. Our firm is characterized by honesty, integrity and a commitment to getting the job done. If you think you can help us exceed our client expectations please respond to our Human Resource Director.

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