What is CoP and why does it matter?

CoP or Coefficient of Performance is the means of stating the ratio of the heat output by the particular technology relative to the amount of energy it uses to operate.

If you’re looking at installing a renewable system into a property, its performance will be dependant on a range of factors.

All the points we’ve outlined below are equally important to ensure your heat pump performance and its efficiency is maximised and that running costs are minimised in the long term:

•Method of construction; concrete and screeds are the ideal partner when combined with underfloor heating and heat pumps.
•Up to standard insulation and U-values.
•Correctly fitted insulation; careless installed insulation will allow heat to escape and renders the insulation job worthless.
•Amount of ground to install trenches - Worcester do not recommend using the slinky method in a trench system!
•Method of heat delivery and how well the system is installed and integrated
•System programming and sizing.

If the above elements are in place, a heat pump should deliver the following efficiencies:

•Efficiency/CoP with radiators : 3.2 •Efficiency/CoP with underfloor heating : 4.6

Expected CoP is taken as an annual average return - obviously in winter it may be lower and higher in the summer.