Services - Geothermal




States of Jersey is committed to achieve secure, affordable and sustainable energy for Jersey in their Strategic Plan.

Providing energy piles for use in ground storage systems is one way that Amplus Ltd can help with the provision of renewable energy and reduce carbon emissions.

Concrete piles are used in a ground storage system to house closed circuits made from plastic piping.  The pipes are used to circulate a heat transfer fluid which transports the ground temperature to the central control system for the building services.  In the central control system a heat pump is used to increase the temperature to a level suitable for heating purposes.

While the average termperature to be found in the concrete foundations is in the region of 12°C, the heat pump produces termperatures of between 25°C and 40°C in the heat transfer fluid, which is suitable for low termperature heating systems in floors and ceilings.  These systems can be used for both heating and cooling purposes.

Amplus has used CFA piles as energy piles.


What is Geothermal energy?


The earth absorbs a great deal of heat from the sun, which allows it to maintain a near constant temperature of 12° throughout the year.


Geothermal engineering allows homes to tap into that source.  At the beginning of a building project Amplus Ltd will bore holes into the bedrock using our specialist rotary drilling equipment Fraste Multidrill XL MAX .Once the house is built, previously installed copper loops will conduct the heat to geothermal pumps located either within the home or an out-building.


The Earthlinked® system literally captures the power of the earth.  The constant temperature is transported through a system of direct thermal interchanges to a heat pump, which can then transfer that heat source to underfloor heating, regular radiators, and hot water cylinders within the home.


Electric utility-sponsored test projects over a period of 15 years have consistently demonstrated that Earlinked® systems are the most efficient means of heating an cooling buildings and heating water.  Earthlinked® is a qualifying EnergyStar® partner product within the standards of the U.S. Environmental Protection Agency.  The product line also has the highest average Electrical Energy Rating and Coefficient of Performance efficiency rating by the Air Conditioning and Refrigeration institute and is safety listed.  Earthlinked® systems are operating in Jersey, England. Canada and 34 US states.


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Frequently asked questions:

Question:  Why is EarthLinked® more efficient than other geothermal systems?
Answer:  EarthLinked® eliminates the intermediate heat transfer required by water-based systems. Its direct heat transfer method does not require the circulating pump found in water-based systems. The system is also inherently more efficient because of ECR's modulating refrigerant flow controls.

Question:  How is the earth loop system installed?
Answer:  DIRECT AXXESS® Earth Loops can be installed horizontally in pits or trenches using excavators or trenchers, as well as vertically or diagonally using small bore drilling equipment.

Question:  How long does it take to install the earth loops?
Answer:  Loops for a 3-ton system in pits and trenches can be installed in a single day. Loops using vertical and diagonal bores can be installed in two days.

Question:  What special training is required for installation?
Answer:  System start-up does not require a purging cart, the addition of antifreeze, or other tasks associated with water loop systems. On the refrigerant side, factory-assembled earth loops are soldered to pre-fabricated manifolds, and visual indicators assist in system charging (no charging charts needed). Thus, little special training is required for installation.

Question:  How long have EarthLinked® systems been operating?
Answer:  In 1980, ECR began research and development of EarthLinked® systems. The first independent documentation of the system's high efficiency performance was in 1984 at the Florida Solar Energy Center. In 1985, field demonstrations began for 10 electric utilities from Florida to Michigan. Marketing commenced in 1994.

Question:  What effect does EarthLinked® have on the environment?
Answer:  U.S. EPA and DOE have determined that ground source heat pumps have the lowest environmental impact of all heating systems and they reduce energy consumption and corresponding emissions up to 72% when compared to electric heat strips and standard air conditioning. The refrigerant used by EarthLinked® is not toxic, and is the same as that currently used by a majority of the HVAC industry.

Question:  How long will the earth loops last?
Answer:  Copper is one of the few metals that exists naturally as an element in the earth. A noble metal, it is essentially immune to corrosion in most underground environments because of the protective film that forms naturally on its surface. In rare exceptions where pH readings exceed safe levels, cathodic protection for the in-ground copper is offered by ECR. With some installations dating back to 1980, ECR has never experienced a field failure of the copper pipe due to corrosion or mechanical damage.

Question:  How do the earth loops work?
Answer:  The standard compressor circulates refrigerant through the earth loops (with sufficient velocity to transport the lubricating oil through the system) while it is heating in the winter or reversing the flow for cooling in the summer. Its patented refrigerant flow controls assure a flooded evaporator condition and full utilization of the condenser for optimum efficiency under all operating conditions.

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