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nGEOTHERMAL HEAT PUMPS

A Heat Pump is a different way to use renewable energy to heat water, that doesn't need solar panels. Heat Pumps can save you a bundle of cash on your heating bills as they use approximately ont third the energy of an electric water heater. If you are building a new home, office building or school you may want to consider energy efficient geothermal heat pumps. A geothermal heat pump (GHP) can be installed in almost any part of the country and will save energy and money. Ground source heat pump systems are the most energy efficient environmentally friendly and cost effective space heating systems today.

While the capital costs may prove to be more than the conventional heating system, these costs can be recouped in the first five to six years. We offer solutions to cover all site conditions should you require a water to water, deep bore-hole or horizontal collector system.

When ground source systems (GHP) systems are installed in commercial buildings, the state of the art designs are extremely competitive on upfront costs when compared with cooling towers and boilers and they have lower energy and maintenance costs. In addition to their cost effectiveness, GHP systems offer aesthetic advantages, quiet operation, free or reduced hot water, improved comfort and a host of other benefits.

WHAT IS A GEOTHERMAL HEAT PUMP?

A Geothermal heat pump uses the earth as a heat sink in the summer and a heat source in the winter and therefore relies on the relative warmth of the earth for their heating and cooling production. Through a system of underground (or under water) pipes, they transfer heat from the warmer earth or water source to the building in the winter, and take heat from the building in the summer and discharge it into the cool ground. Therefore, GHP don't create heat: they move it from one area to another

HOW DO THEY WORK?

The ground heat exchanger in a GHP system is made up of a closed or open loop pipe system. Most common is the closed loop, in which high density polyethylene pipe is buried horizontally at 4-6 feet deep or vertically at 100 to 400 feet deep. These pipes are filled with an environmentally friendly antifreeze/water solution that acts as a heat exchanger. In the winter, the fluid in the pipes extracts heat from the earth and carries it into the building. In the summer, the system reverses and takes heat from the building and deposits it to the cooler ground.

 
INSTALLATION OPTIONS
There are four basic types of ground loop systems. Three of these - horizontal, vertical and pond/lake - are closed-loop systems. The fourth type of system is the open-loop option. Which one of these is best depends on the climate, soil conditions, available land, and local installation costs at the site. All of these require coils and regularly changing the air filters are about all the work necessary to keep the system in good running order.

CLOSED-LOOPS SYSTEMS
HORIZONTAL
This type of installation is generally most cost-effective for residential installations, particularly for new construction where sufficient land is available. It requires trenches at least 3' to 4' feet deep. For illustration refer to www.neura.com.
ons
VERTICAL
Large commercial buildings and school often use vertical systems because the land area required for horizontal loops would be prohibitive. Vertical loops are also used where the soil is too shallow for trenching, and they minimize the disturbance to existing landscaping. For vertical systems, holes (approximately 6" in diameter) are drilled about 20 feet apart and 200 to 400 feet deep. Into these holes go tow pipes that are connected at the bottom with a U-bend to form a loop. The vertical loops are connected with horizontal pipe (i.e. manifold), placed in trenches, and connected to the heat pump in the building. For illustration refer to www.neura.com.
s
POND/LAKE
If the site has an adequate water body, this may be the lowest cost option. A supply line pipe is run underground from the building to the water and coiled into circles at least 8 feet under the surface to prevent freezing. For illustration refer to www.neura.com.
tions
OPEN-LOOPS SYSTEM
The type of system uses well(s) or surface body water as the heat exchange fluid that circulates directly through the GHP system. Once it has circulated through the system, the water returns to the ground through the well, a recharge well, or surface discharge. The option is obviously practical only where there is an adequate supply of relatively clean water, and all local codes and regulations regarding groundwater discharge are met. For illustration refer to www.neura.com.

BENEFITS OF GEOTHERMAL HEAT PUMPS
While producing lower heating bills, GHP are quieter than conventional systems and improve humidity control. These features help explain why customer surveys regularly show high levels of user satisfaction.
Because a GHP is so efficient, it uses a lot less energy to maintain comfortable indoor temperatures. This means less energy is need to operate a GHP thereby reducing energy consumption and corresponding emissions.
A GHP system has relatively few moving parts, and because those parts are sheltered inside a building, they are durable and highly reliable and the GHP's often last 20 years or more.
GHP system installations are not a do-it-yourself project because of the technical knowledge and equipment need to properly install the piping and requires a qualified installer.

We have the answers to all your needs and we are fortunate in that we are not tied to any one Agency which allows us to source
the materials from a number of companies to suit our customer's needs. We can offer different types of heat pumps to suit different
sites so no matter what we come up against we endeavour to find an appropriate solution. See links to our supplier for further
information.



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