Residential Geothermal Installation
Overview
Achieve completed the installation of a geothermal heating and cooling system in
an 3,900 square foot, three-level, coastal home in Marblehead, MA. This newly constructed
home was designed for high efficiency and exceptional indoor air quality.
Design
Achieve designed a radiant-floor heating and high velocity air conditioning system
based on the calculated heat and cooling loads for the house. A Standing Column
Well heat exchanger was designed and two water-to-water groundwater heat pumps were
installed. Achieve configured the geothermal system with a seven zone radiant flooring
system. In the cooling season, the heat pumps produce chilled water that is used
in conjunction with a high-velocity air conditioning system to provide cooling.
Installation
The standing column well was installed to a depth of 600 feet and the two water-to-water
heat pumps were ‘staged’ to activate together or independently depending on the
heating and cooling demands. The temperature of the water in the radiant tubing
is adjusted automatically based upon outdoor temperature. This ‘outdoor reset’ dramatically
increases the efficiency of the system.
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Key Site Information
Site Location:
- Marblehead, MA
- 3,900 sq. ft. residence
- Lot size 0.26 acres
Date of Install:
Site Details:
- All three levels of home heated via radiant flooring
- High-velocity system used for air conditioning
- Standing Column Well used as geothermal source
- Close proximity to ocean considered in well design
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