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. W.H. Demmons, Inc. meets all your HVAC, Geothermal and Roofing needs

Vision Statement

To be recognized as the most innovative, best
quality building systems contractor in Maine.

Mission Statement

To design, build, and maintain systems that create
healthy, safe, and comfortable indoor environments.


W.H. Demmons, Inc.

W.H. 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.

W.H. Demmons' longevity and sustainability in the industry is a testament to the company's expertise and experience.

  

RECENT PROJECTS
Saco Transportation Center
Colby College Alumni Building
Embassy Suites
York County Courthouse
Maine State Credit Union
Waldo County YMCA
View More Projects

 

 

HVAC DIVISION &
Reliable Controls

Maine Air Conditioning now operates as the HVAC division, including a controls department focused on cost efficient user-controlled systems.

Click here to learn more about W.H. Demmons HVAC and Controls Division
 

GEOTHERMAL
Design & Installation

W.H. Demmons is a proven forerunner in design and build geothermal construction in New England, having completed numerous geothermal projects since 1992.

Click here to learn more about W.H. Demmons Geothermal
 

DEMMONS ROOFING &
Duro-Last White Roofs

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.

Click here to learn more about W.H. Demmons Roofing
 
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W.H. Demmons, Inc. | 93 Warren Avenue | Portland, Maine 04103 | 207-797-7468 | www.whdemmons.com