Environmental Installations
Saving Energy for your future

Frequently asked questions


What kind of ground works best?

Any ground with soil or rock, but it does not work favourably with sand.


Does it use a lot of electricity to run the heat pump?

An independent study done by the S.E.I. completed in 2002, based on a geothermal heat pump using 20,000 kWh per year, costs €168.75 approx.

How efficient is it?

Based on the ground temperature being 0°, it is 480% efficient.


In the unlikely case that the boiler overheats will this damage the pipes?

No this particular plastic pipe used it will accept up to 110 degrees with no ill effects.


Can anyone have rock-/ground-/lake source heating?

It completely depends on the circumstances. If you have a rock shelf not too far beneath the surface of the ground it is no problem. If you have a large plot or fields around the house, ground source is a very good alternative because it is more cost effective to install. If your house is near a lake and you have a lake plot with permission to use water source heating this is also a good alternative.


How deep must the collector be between the bore hole and the house?

The collector should be laid about 1 m deep and act as a ground collector on the way to the house. Incoming and outgoing pipes should be separated or insulated from each other.


Will the heat in my bore hole run out?

The heat that is taken from the ground comes from the sun's rays and as long as the sun shines the ground is recharged during the summer months provided that the installation is correctly dimensioned. The ground operates as a gigantic battery where water conducts new heat into your bore hole.


We are a family of four, is the integrated water heater of 160 litres enough?

That completely depends on what your hot water consumption is as a family. In normal use 160 litres is fine for a family. If one has a jacuzzi that is used frequently one should perhaps consider either supplementing with an external hot water heater (Compact 200 type) or select an 11-model with external accumulator tank.


I have a pool, wood boiler and a solar panel. Can I use these together with the heat pump?

NIBE's heat pumps and other products, such as boilers and hot water heaters, are designed to be compatible with lots of different products and operating conditions. NIBE recommends different solutions for dockings between different systems. These can be found in "Installation and Maintenance Instructions" which can be downloaded from the website. For special cases contact NIBE and we will help find the best solution.


How should one isolate the collector at the house?

The collector must be insulated for the last few metres (at least 2 m) to the house. This is to avoid freezing around the collector with frost.


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Northern Ireland
Republic of Ireland