As reported in Building4Change, domestic ground source heat pump (GSHP) users could earn around £3,000 a year in savings and income from the government’s Renewable Heat Incentive (RHI), with air source heat pump (ASHP) users potentially earning around £1,350 a year in savings and income according to a new Energy Saving Trust study.

The report builds on research carried out by the trust three years ago, finding that the performance and efficiency of heat pumps has improved following recommendations that it made after initial work on design, installation and operation of the technologies.  |  Full report available here >

Jaryn Bradford, senior technical manager at the trust, said, “From the study, it is clear that heat pumps are sensitive to design, commissioning and how the householder uses the system.  However, the performance monitoring trials have provided early indications that the introduction of improved installation standards, among other things, will lead to improved performance.”

RHI payments

In July RHI tariff levels were set at 7.3p/kWh for ASHPs and 18.8p/kWh for GSHPs, payable for seven years.  For the study, RHI income is based on a four bedroom detached home with 250mm loft insulation and filled cavity walls – minimum requirements for RHI – with electric storage heating.  The income is calculated on the RHI tariff of 7.3p/kWh for renewable heat generated from ASHPs with an average seasonal performance factor (SPF) (H4) of 2.45; and 18.8p/kWh for renewable heat generated from GSHPs with an average SPF (H4) of 2.82, based on the results from the trust’s heat pump study.