Company Overview
Company Name
W.H. Demmons
Address
93 Warren Ave, Portland, ME, 04103, United States
Website
whdemmons.comPhone
(207) 797-7468Approx. Annual Revenue
$10.0M
Employees
50
Established
1914
Google Reviews
3.3 (16 reviews)
About W.H. Demmons
W.H. Demmons is a design-build-maintain firm based in Portland, Maine, specializing in HVAC, roofing, and building automation solutions. The company serves clients throughout Maine, New Hampshire, and beyond, offering expertise in areas such as improved air quality, marijuana grow rooms, and geothermal systems.
Business Profile
Read from the W.H. Demmons website on Oct 12, 2026. Hover an item to see the exact wording it came from.
About the website
- Website quality (AI-assessed)
- 8/10 · Current news and project updates; Detailed services and portfolio
- Footer copyright year
- 2025
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Key Decision Makers
Douglas Martin Owner