Heating Design - Heat Pump Systems

Lower your energy bills and reduce your carbon footprint with a Heat Pump – these are a renewable technology that converts energy in the ground or air into heat. This process delivers green, low-cost, energy-saving heating and hot water all year round.


The UK government has a number of incentives to improve the energy efficiency of your homes and heat pumps are an ideal solution to reduce your properties carbon footprint while lowering your energy bills.

Heat pumps can deliver a number of benefits:

  • Lower your fuel bills
  • Eligible for the government's Renewable Heat Incentive (RHI) (Ground Source Only)
  • Lower your home's carbon emissions
  • Does not require fuel deliveries
  • Little maintenance required

How do heat pumps work?

Put simply a heat pump takes the available heat from the ground or air surrounding a property and increases it to a more useful temperature for use in the home. This renewable source of heat can be used to create warm air or water (for space and central heating) as well as hot water (for both central heating and domestic hot water supply). It achieves this by taking the same principle that allows a fridge to cool your groceries and by utilising it in reverse.


A heat pump operates in the following way:

  • The source of heat, which can be outside air or a water mix which is contained within ground collectors, is either blown or pumped over the heat exchange surface of the outside part of the heat pump.
  • This heat (although cold in comparison to a homes internal air) is warm enough to cause the special refrigerant liquid to evaporate and turn into a gas.
  • This gas is then put through a compressor which increases the pressure of the gas, a factor that causes its temperature to rise. For example you may have noticed that a bicycle pump, gets warm when it is used, the gasses in a heat pump experience the same temperature rise due to compression.
  • The gas (now heated) is passed over the internal heat exchange surface. This heat can then be either blown around a property or be transferred into a home’s central heating or hot water system.
  • The gas falls in temperature as the heat is transferred into the home and it subsequently returns to a liquid state.
  • The refrigerant returns to the outside heat exchange surface and the process repeats itself until sufficient heat is passed into the home.

Government Funding for Heat Pumps

The Worcester Bosch Greensource and Greenstore Heat Pumps are eligible for the UK governments Renewable Heat Incentive (RHI) scheme.


Renewable Heat Incentive (RHI)

The Renewable Heat Incentive (RHI) is the world's first long-term financial support programme for renewable heat. The RHI will pay participants of the scheme to generate and use renewable energy to heat their buildings. The domestic RHI is targeted at, but not limited to, homes off the gas grid. Those without mains gas have the most potential to save on fuel bills and decrease carbon emissions. Tariffs have been calculated by The Department of Energy and Climate Change (DECC) and will change annually in-line with the previous year's Retail Price Index. All payments are made directly to the homeowner retrospectively every quarter over a period of seven years.




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