Product Information

Open-Loop GSHP Installations

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An Open-loop ground source heat pump installation could:
- Meet all your heating needs
- Meet all your water needs (subject to analysis and suitable filtration)
- Provide an additional grey water supply
and all at a fraction of the running cost of a conventional gas boiler.

How do they do that?
The Earth continually absorbs heat from the sun and stores it in the ground, below the Earths surface. At depths below 1 metre, the ground temperature is consistently between 8°C and 14°C. A ground source heat pump is designed to use this constantly renewed energy to supply domestic heating and hot water.

With an Open-Loop installation, a water supply borehole would be drilled and water at a temperature of around 11°C pumped into the building, where flow could be diverted to feed both a potable (drinkable) water supply and an open-loop heat pump. The heat pump extracts heat from the water and uses it to raise the temperature of water being circulated throughout the house. There are usually two separate water circuits, one for space heating up to 55 °C and another for domestic hot water up to 65°C.

Cooled water at around 6°C is directed from the heat pump back into the ground, where the ground temperature warms the water back up. A harvesting tank can be installed to store the discharge from the heat pump, thereby providing a water supply for garden irrigation or other ‘grey-water’ use. Unlike rain water harvesting tanks that are only replenished when it rains, a heat pump harvesting tank is replenished whenever the heat pump is in operation. If the harvesting tank is buried in the ground, the water starts to reclaim heat immediately.

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About us

Specialists in:
Sewage Treatment Systems
Ground Source Heat Pumps
Water Supply and Soakaway Boreholes

SEWAGE TREATMENT:
Since 1984 H.D. Services has been developing sewage treatment systems culminating with the introduction of their HD-SM in 1994. Over the years we have installed hundreds of HD-SM sewage treatment systems throughout southeast England serving thousands of people.

Our unique modus operandi covers design, supply, installation, commissioning, and servicing. We do not employ agents to sell or install our systems and can take full responsibility for ensuring the discharge complies with the consent issued by the Environment Agency.

GROUND SOURCE HEAT PUMPS:
H.D. Geothermal is part of H.D. Services Ltd, a fully MCS accredited company. We aim to provide the highest quality Open-Loop Ground Source Heat Pump service available in South East England. Our customers can rely on our advice and flexibility to suit their individual requirements and we associate ourselves with suppliers who adopt a similar ethos. H.D. Services Ltd is committed to completing contracts on time and use only directly employed labour.

DRILLING SERVICES:
H.D. Services Ltd. has been constructing water supply and soakaway boreholes in the South East of England since 1984. We have been members of the Well Drillers Association (WDA) since 1988 and have a vast knowledge of the hydro-geology. This means that we can generally confirm the feasibility of a proposed installation upon receipt of a site postcode.

We aim to provide the highest quality, percussion-drilled water supply borehole service available. Our clients depend on our advice and flexibility to suit their individual requirements and we in turn associate ourselves with only those suppliers that have a similar ethos. We are committed to completing contracts on time, using only directly employed labour and our own modern plant.

All drilling works associated with our renewable heating installations and sewage treatment systems are carried out in-house. An initial telephone call to our offices will result in the receipt of a budget proposal with prices for consideration at your leisure. Our engineers can visit the site, free of charge and without obligation, to assess and measure the site.

H.D. Services Ltd are BS EN ISO 9001 and BS EN ISO 14001 certified

PRODUCTS AND SERVICES
Sewage Consultants Services
Sewage Consultants' Equipment & Supplies
Tank Work & Tank Cleaning
Wellborers & Sinkers' Services
Ground Source Heat Pumps