W.H. Demmons in Portland, Maine designs-builds-maintains energy efficient building systems including HVAC, Controls, Geothermal Heating & Cooling, Duro-Last White Roofs, Metal Roofs & more.
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Demmons is a design-build-maintain engineering firm focused on reducing your company's energy costs through proven innovative engineering, design and installation.
Comprised of three sub-companies: Maine Air Conditioning, Demmons Roofing and Demmons Geothermal, W.H.Demmons is dedicated to cutting your energy costs.
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Demmons' longevity and sustainability in the industry is a testament to the company's expertise and experience.
W.H. Demmons is a proven forerunner in design and build geothermal construction in New England, having completed numerous geothermal projects since 1992.
Our highly trained and experienced engineers can help you design a highly efficient roofing system, including the only New England installer of Duro-Last White Roofs.