W.H. Demmons W.H.


HVAC/R, Roofing, Brunswick, ME

WH Demmons, Inc. Hired to Engineer and Building the Geothermal HVAC System and Roofing System

In the spring of 2014 W.H. Demmons, Inc. was brought on board to help with the engineering and installation of the Geothermal HVAC System and Roofing System for this 20,000 square foot Platinum LEEDs office building. The team leader was CWS Architects out of Portland, Maine and Allied Cook Construction, of Scarborough, Maine.

W. H. Demmons Geothermal HVAC Design

After review of the Hydro-geology we decided to proceed with three (3) standing column wells, each of approximately 1,200 feet deep. This will be the heart of our design, providing the energy and thermal storage to heat and cool this building. This open well system returns water to the bottom of each well, with well pumps located at approximately 200 feet. And while these are open wells, they are design not to bleed water which maximizes the thermal storage capabilities for improved energy efficiency.
Other key components of our design is the use of Aaon Roof Top Units with chilled water coils, economizers for free cooling, VFDs (variable frequency drives) on motors, VAV boxes with hot water coils, perimeter radiant floor heating, and our Reliable Controls DDC System with the standard 5 (five) year warranty, remote access and trouble shoots, energy monitoring, and a full BACnet system. See ReliableControls.com for other features and benefits.

W. H. Demmons White Roofing System

We designed and installed a white Duro Last Roofing System with an R30 insulation package. This roofing system carries some of the best warranties in the business, including full coverage of everything under the roof. The white roof also reflects heat in the summer months, making this a cool roofing system while keeping the roof surface temperature with 3 0F of the outside ambient temperatures. How is this different from black roofs? Well a black roof in Maine will reach temperatures of greater that 165 0F, yes even in Maine. Creating what is called as a ‘Heat Island’, which adversely affects our climate, and increasing operating costs.

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