Geothermal Drilling

A Geothermal system is used for extracting natural heat down in the bedrock that can be used to heat your home or other buildings. The heat energy can be transferred to an existing conventional waterborne heating system and can also be used to produce hot water. It is used to it's optimum performance with under floor heating.

The heat is collected from the bedrock and the groundwater by drilling one or more deep boreholes. A heat pump is used to collect and transfer heat to the heating system of the house. Savings of up to 60% on your heating bills can be achieved - compared with conventinal heating systems.

Our Geothermal Drilling CV

To date we have drilled a number of such wells for Trinity College - Dublin, Civic Offices - Wood Quay and The Green Building - Templebar. In February 2003 we drilled our first geothermal wells for a private domestic installation in Cranfield, Co. Down.


Heat your home from a renewable heat source in the Earth by installing a ground Source Heat Pump.

  • Reduce your heating bills
  • Reduce C02 emissions
  • Clean renewable energy
  • Improve you home energy rating
  • SEI Greener Homes Scheme Grants available up to €6,500

What is a Ground Source Heat Pump?

Ground source heat pumps (GSHP) are electronically powered systems that tap the stored heat in the Earth. These systems use the Earth's relative constant temperature to provide heating, cooling and hotwater for homes and commercial buildings.

System Types

Ground source heat pumps can be categorised as having closed or open loops. These can be installed in three ways: horizontally, vertically, or in a pond / lake. The type chosen depends on the available land area and the soil or rock type at the site.

Open Loop System

With open loop heat system there isint really a 'loop'. Instead you have two boreholes. The first borehole or 'pumping well' is drilled until an adequate souupl of water is found - typically 800 - 900 gallons per hour. A second 'reinjection well' is drilled some distance away, or alternatively open discharge may be available. this system is dependant on a suitable water supply being available under your property.

Vertical Loop System

With the vertical loop system the collector pipes are installed in one or more deep boreholes. Borehole depths are typically 150 - 160m. This system offers slightly greater efficiencies and is useful where space is limited or where rock is near the surface.

Horizontal Loop System

The Horizontal Loop System is a bit more common and economical. Instead of going down deep in the Earth, you dig trenches over a wide area, typically about 5ft deep. Soil conditions must be suitable for this system to work well. Typically you will require several hundred feet of trenches.

Geothermal Drilling Ltd

We offer a professional drilling service at competitive rates. All work is carried out by highly experienced crews using the most up to date and efficient rotary drilling rigs.


Call Us Now

Get in touch for information on how we can help you
  • +353 (0) 42 9372188
  • Email Us
  • www.dunnesdrilling.com

Our Address

  • Dublin Road
  • Dromiskin
  • Dundalk
  • County Louth
  • Ireland

Our Clients