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Heat Pumps

Our environment is full of energy, even at sub-zero temperatures there is plenty of energy available.

Heat Pumps  use conventional refrigeration technology to extract the sun’s energy stored in the environment and raise it to a temperature suitable for heating purposes. This principle works even in the middle of winter at temperatures as low as -25°C.

Why choose a heat pump?

In the context of ever rising energy costs and climate change, every household is in need of a heating technology that is future-proof, cost-effective and independent of fossil fuels.

One system for all types of heating sources

A Dimplex heat pump for example; offers you three different future-proof heat sources: outside air, the ground or water.

How The Trusted Technology Works

A heat pump heating system consists of 3 components: the heat source, the heat pump itself and a heat distribution and storage system. Heat pumps are able to produce more energy than they consume by using the conventional refrigeration cycle to absorb heat from the environment and raise it to a suitable level for heating.

  • 25% of the energy is sourced from the national grid in the normal way of supplying your electricity. This is used to operate the heat pump but with very low consumption
  • 75% of the energy is taken from the environment i.e the air or ground and transferred to the heat pump.
  • The energy from the air or ground is transferred to the refrigerant inside the heat pumps evaporator. This causes the temperature of the refrigerant to rise and change state from   liquid to gas.
  • The refrigerant gas is then compressed, using an electrically driven compressor, reducing its volume but causing its temperature to rise significantly.
  • A heat ex-changer (condenser) then extracts the heat energy from the hot refrigerant to heat water for central heating, underfloor heating or domestic hot water.
  • After giving up its heat energy the refrigerant turns back into a liquid and is able to absorb energy from the environment, allowing the cycle to begin again.
Using nature's energy efficiently
  • Heat pumps are among the most efficient heating and hot water systems available today. Approximately 75% of the energy needed for heating comes from the environment. This means that for every 1kWh of electricity used to power the heat pump compressor, between 3 and 4 kWh of heating energy are produced, giving the heat pump an efficiency of 300-400% or higher.


  • The heat pump’s “efficiency” is known as it’s “Coefficient of Performance” (CoP). This is simply a ratio between the proportion of the total energy supplied that can be extracted from the environment and the amount supplied by electricity to run the heat pump compressor. The higher the CoP, the more “free” environmental energy the heat pump is using!
Benefits of the outside air as a heat source
  • Can be utilised all year round between -25ºC and +35ºC Always available and inexhaustible source of heat
  • No requirement for the cost and land area of ground collectors
  • Ideal for new build or retro fit applications, especially where space is limited
  • Can be used for heating, cooling, domestic hot water and swimming pools (NB – cooling application setups will not entitle the applicant for the R.H.I or the R.H.P.P