Leeds Sustainability Institute

Building Fabric Performance



Build Process

New Build

Modern Methods of Construction


Under-Construction Testing

Post-Construction Testing

Forensic Performance Investigation

In-use Energy Consumption

Post-Occupancy Evaluation

Party Wall Bypass

Control Systems



Climate, Environment, Buildings & Energy
Evaluation of Heat Pump Installations: Extracting Meaning from Existing Data Sets

Harrogate Borough Council has placed itself in the forefront of sustainable development of existing social housing stock by installing Ground Source Heat Pump technology in around 80 properties, with plans for further installations in the future.

Ground Source Heat Pumps extract heat at relatively low temperatures from an external ground loop or borehole, and transfer this heat to water in a heating system, raising its temperature sufficiently to provide both space heating and domestic hot water. The system can be supplemented by a small amount of electrical resistance heating to cover any shortfall and to raise domestic hot water temperatures to high levels for short periods, e.g. during pasteurization cycles.

Some monitoring of heat pump operation and performance has already taken place and some (limited) contextual information (building type, occupancy, maintenance etc.) is also available. This data has been gathered by Harrogate Borough Council as part of normal operations, without, as yet, any attempt at a systematic analysis of heat pump performance across the Borough.

This project aims to systematize existing data, using the conclusions drawn to inform the scope and methodology of future data collection. As far as is practicable at this stage it will assess the energy cost and CO2 savings achieved by the systems, and will develop in-depth case studies of a small number of selected installations via collection of additional data.

Project Objectives

  • To extract meaning from heat pump temperatures and other operational data already collected.
  • To calculate or estimate the heat pump running costs and CO2 emissions.
  • To compare running costs and CO2 emissions with those expected to result from other types of heating system.
  • To make recommendations regarding future data collection.
  • To study a small number of installations in greater depth, in order to further understand issues relating to building fabric, comfort and occupant behaviour practices.

Project Partners

Harrogate Borough Council


Final report