Live GxTracker™ Sites


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NEW! Chelmsford MA

Single family residence (2,600 sf) built in 1980. The system has one 5-ton water to air heat pump with a desuperheater servicing three zones. The ground loop consists of two 425 ft deep boreholes and is a closed loop system installed by Skillings & Sons. Flow rate is assumed constant. Cost savings are calculated using measured power consumption.


Rye NH

A 3,000 sq ft residence built around 1965 with a 6-ton, closed loop, water to air GSHP system. There are two zones serving the main house and an in-law apartment. The system was designed to have 2 x 480 ft boreholes, but ended up with with 3 boreholes (one 480 ft and two 240ft) due to fractures encountered during drilling.


Montvale NJ


590 feet of TWISTER vertical loop heat exchanger was installed in this (3500sf) single family residence Built around 1970. The system is a 7 ton water to water heat pump serving multiple zones, which is fully monitored including actual system flow rate as well as loop temperature and power consumption.


Carlisle MA

A single family residence (3,500 sf) built in 1996. The system has one 6-ton water-to-air heat pump with a desuperheater a serving a single zones. The ground loop consists of 3 400 ft deep borehole and is a closed loop system, installed by Skillings & Sons. Flow rate is assumed constant. Cost savings are calculated using measured power consumption.


Westford MA

A single family residence (3,900 sf) built in 2013. The system has one 3-ton water-to-air heat pump with a desuperheater and a heat recovery ventilation (HRV) system serving 3 zones. The ground loop consists of a single 510 ft deep borehole and is a closed loop system, installed by Skillings & Sons. Flow rate is assumed constant. Cost savings are calculated using measured power consumption.


Durham NH

A single family residence (2,100 sf) renovated in 2012. The system has one 4-ton water-to-air heat pump. The ground loop consists of 2 350 ft deep boreholes and is a closed loop system. Flow rate has been measured and is assumed constant. Cost savings are calculated using power consumption measured with the Plus Power Accessory.


Durham NH

A single family residence (2,300 sf) built in 2011. The system has one 3-ton water-to-air heat pump and uses a standing column well in a single vertical borehole.  Flowrate has been measured and is assumed constant.   Cost savings are calculated using power consumption measured with the Plus Power Accessory.


Southington CT

A single family residence (3,200 sf) built in 1995. The geothermal system was installed in 2011 and consists of three heat pumps. The ground energy source is a vertical closed loop. This site is monitored for total BTU production by measuring the total flow rate and the difference in entering and leaving loop fluid temperatures. Because runtimes of individual heat pumps are not being monitored, cost and carbon savings cannot be computed.


South Windsor CT

A single family residence (1,875 sf) built in 1986. The geothermal was installed in 2009 and consists of a single water-to-water (3 ton) heat pump. The ground energy source is a vertical closed loop. Flow rates are set at the constant design rate and cost savings are modeled using measured runtime and heat pump manufacturer specifications.


Litchfield CT

A single family residence with two zones totaling 3900 sq. ft. built in 2004. Zone 1 with 1980 sq. ft. is served since 2008 by a 2 1/2 ton split geothermal heat pump and 730’ of horizontal series loop buried 6’ deep in the yard. Constant flow rate is used.


Kensington CT

A single family residence (2,350 sq ft) built in 1955. A single 4-ton heat pump was installed in 2008 using a closed vertical loop. This site is measuring both flow rate using a Seametrics flow meter and the electrical consumption of the Heat Pump, Flow Center, and Auxiliary Heat Strip using a WattNote electric meter.


Barrington NH

A single family residence (2,650 sf) built in 2008. The system has two water-to-air heat pumps, one 3-ton unit serving the upstairs and a 5-ton units serving the main floor. The loop is a standing column well in a single vertical borehole. Flowrates are being measured with the Flow Kit. Cost savings are modeled using measured runtime and heat pump manufacturer specifications.


Geothermal RECs in NH — 2014 RECs SOLD!

Matt Davis  -  Jun 20, 2015  -  1 Comments
Another milestone reached After more than three years since the passage NH SB-218, another major milestone has been reached. This week, Revolution Energy and Knollwood Energy teame...

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New Hampshire Recognizes Geothermal Heat Pump System as a Renewable Energy Facility

Matt Davis  -  Dec 10, 2014  -  No Comments
Today, the New Hampshire Public Utilities Commission approved Rolling Dog Farm as a Class 1 Thermal Renewable Energy Source, the first geothermal system to be recognized under the ...

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NH Thermal RECs: What you need to know

Matt Davis  -  Jul 17, 2014  -  4 Comments
Thermal Renewable Energy Certificates (RECs) in New Hampshire In 2012, the New Hampshire Legislature passed SB218 that formally incorporated ‘useful thermal energy generated ...

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Performance Monitoring – COPs

Matt Davis  -  Jun 13, 2013  -  , , ,  -  Comments Off
Introduction This article is the second in a three-part series prepared by Ground Energy Support LLC (GES) that will highlight some of the lessons learned from over 100,000 hours o...

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Performance Monitoring – Ground Loop

Matt Davis  -  Jun 01, 2013  -  , , ,  -  Comments Off
This article is the first in a 3-part series prepared by Ground Energy Support LLC (GES) that will highlight some of the lessons learned from over 100,000 hours of GSHP real-time m...

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Performance Monitoring Series

Matt Davis  -  May 25, 2013  -  , , ,  -  Comments Off
In Spring 2013, we began publishing a series of articles on Performance Monitoring that highlight the lessons learned from over 100,000 hours of geothermal heat pump system monitor...

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Measurements Confirm GSHP Cost Savings

Matt Davis  -  Jul 10, 2012  -  Comments Off
One unique capability of the GxTracker™ is to accurately document both the energy produced by a GSHP system as well as the energy consumed.   Combining this system-level perfor...

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Geothermal as a Renewable Energy

Matt Davis  -  Jul 02, 2012  -  , , ,  -  Comments Off
Recent Maryland legislation formally recognizing geothermal heating and cooling (GHC) system as a renewable energy resource has great potential for increasing the adoption of groun...

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  • Our Mission

    Ground Energy Support strives to provide high quality data and objective analyses to support the ongoing development of ground source heat pump technology.
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