1240 Ground Source Heat Pump with Integrated Cylinder

• Heat Loss of Property at -3oC = 6.75kW
• Coefficient of Performance of Heat Pump = 3.96
• Electricity is 8.0 p/kWh; Gas is 3.5 p/kWh; Oil is 40 p/litre 3.9 p/kWh
• Low Carbon Buildings Programme Grant = £1,200.00
• Install Cost (per man hour) £37.50
• Gas Boiler Annual Service Charge £100.00; Oil Boiler Annual Service Charge £150.00
• Electric Boiler Efficiency 100 %; Gas Boiler Efficiency 86 %; Oil Boiler Efficiency 86 %
• Guide HP Install Cost @72hrs = £2,700.00
   

Guide Supply & Install Prices
Heat Pump = £12,483
Gas Boiler & Unvented Cylinder = £3,250.00
Oil Boiler, Tank & Unvented Cylinder = £4,750.00
Annual Running Costs/CO2 Production
Heat Pump = £461.04,2346kgCO2
Gas Boiler = £1,003.37,5007kgCO2
Oil Boiler = £1,155.28,6840kgCO2

Heat Pump Payback
Vs. Gas 10.2 years; Vs. Oil 5.8 years

Assumptions.

1. The performance of Microgeneration heat pump systems is impossible to predict with certainty due to the variability of the climate and its subsequent effect on both heat supply and demand.  This estimate is based upon the best available information, but is given as guidance only and should not be considered as a guarantee.
2. The “Total Energy Requirement for Heating and Domestic Hot Water” figure is calculated by determining the maximum steady state heat loss of the property at worse case, i.e. when the outdoor temperature is -3°C. A standardised weather pattern is then used to calculate the amount of energy used by a property of that heat loss during the year. Unusual practices, for example leaving windows open in winter, will result in the operation of the heating system differing from our estimates and reduce the accuracy of our figures. Domestic hot water consumption is also based on standard usage patterns.
3. The “Coefficient of Performance of Heat Pump” figure is calculated over an entire twelve months heating period (otherwise known as the Seasonal Performance Factor, or SPF) and is based purely on the operation of the heat pump compressor, not including any supplementary heating requirement.
4. The gas, oil and electricity prices shown are estimates based on what we would expect you to be charged. Since fuel prices change on an almost daily basis, as well as varying by location and supplier, these figures may differ slightly from what you currently pay. We would recommend that you compare these to a recent bill.
5. The price per kWh of electricity is based on the heat pump running on an Economy 7 or 10 electrical tariffs. The weather compensated nature of our heat pumps’ operation results in them running on approximately 2/3 off-peak electricity and 1/3 at peak rate.
6. The figures assume that a successful grant application will be made.
7. The installation cost for the heat pump and the supply and installation costs for gas/oil boilers are purely estimates. Quotations should be obtained for the work involved to provide figures specific to your property.
8. The heat pump and boiler installation costs do not include the supply and installation of the primary pipe work between the heat source and the heating system or cylinder. The pipe work involved will be very similar for each system so will cancel out when comparing the installation costs of a heat pump to a boiler.
9. Our heat pumps have an expected life span of 20 – 25 years, which is approximately twice that of a gas or oil boiler. The payback period calculated does not take into account the additional cost of the second boiler that would need to be purchased half way through the heat pump’s life.
10. The mass of CO2 produced by each heat source is based on SAP 2005 figures of:
      0.422 kg CO2/kWh for grid electricity; 0.194 kg CO2/kWh for gas; 0.265 kg CO2/kWh for oil

These prices have been calculated for the housing model on this website, so a site assessment will be required, or site drawings can be emailed over, but please contact your AlternEnergy Project Manager to discuss matters further and discuss the best options available to your specific property.

NB – The heat emitters need to be compatible with the energy output of the system, therefore under floor heating or over sized efficient radiators are required.  The cost for this, along with any necessary bore holes or trenches, is not included in these figures but can be priced for you separately.