Ongoing projects

In this section information about the ongoing Annexes in the Heat Pump Programme can be found.

The table below summarises the ongoing Annexes, for more information use the links in the left margin. Bold text among the participants indicates Operating Agent.


Annex 46

Heat Pumps for Domestic Hot Water

The objective of the Annex is to analyse the information on DHW-heat pumping technologies and structure it to the market - ranging from end user to consultant, building constructor, and policy maker - in such a way that leads to better understanding the opportunities and implementing them in order to reduce the use of primary energy consumption and CO2-emisions and lower energy costs.

The Netherlands
The Annex is still open for new participants.

Annex 45

Hybrid Heat Pumps

Heat pump and fossil fired boiler as hybrid heat pump systems. For space heating and domestic hot water systems in residential and light commercial buildings.

The main objective is to investigate the potential of energy and emission of greenhouse gasses emission reduction by the increased implementation of hybrid heat pumps. Both through replacement of boilers, and by means of upgrading the systems’ efficiency in existing running installations.

The focus of this Annex will be on the residential sector, as well as the light commercial sector, where the market overview shows potential. The annex participants foresee justification to investigate this specific segment.

The Netherlands
The Annex is still open for new participants.

Annex 44

Performance indicators for energy efficient supermarket buildings pumps

Energy consumption data for individual stores of supermarket chains are often available, through own measurements or from utility bills. But these data only become meaningful when put in the right context of sales area, outdoor temperatures, etc. Only then can the actual energetic performance of individual stores be assessed. A method to do this will be developed in this Annex, with an emphasis on practical use rather than academic perfection.

Norway, the Netherlands, and Sweden.
The Annex is still open for new participants.

Annex 43

Fuel-driven sorption heat pumps

  • Field test of different fuel driven heat pumps
  • Compare different system configurations e.g. different sources
  • Evaluate different technologies for different applications e.g. retrofit versus new buildings
  • Classification of system schemes, generic system layout
  • Potential study, roadmap

Austria, France, Germany, Italy, UK, and US.
The Annex is still open for new participants.

Annex 42

Heat Pumps in Smart grids

Knowledge gathering and dissemination of HP in urban areas;

  • Domestic and light commercial build environment;
  • Time dependant energy demand analysis;
  • Inventory of information for dissemination;
  • Investigate development possibilities;
  • Inventory of critical success factors for implementation smart grids and smart cities

Denmark, France, the Netherlands, South Korea, Switzerland, UK, and US.
The Annex is still open for new participants.

Annex 41

Cold Climate Heat Pumps (Improving low ambient temperature performance of Air-Source Heat Pumps)

Identify technology solutions  leading to successful (efficient & reliable) systems/equipment for residential and small commercial buildings in cold climate locations with primary focus on air-source heat pumps.

Austria, Canada, Japan, and US.

Annex 40

Heat pump concepts for Nearly Zero-Energy Buildings

1) Optimisation of concepts for buildings in order to reach Nearly Zero Energy consumption applying heat pumps as core component of the building technology

2) Evaluation of building- and system integration options favorable for the application in Nearly Zero Energy Buildings

3) Requirements for further developments of current marketable heat pumps to exploit specific performance opportunities in Nearly Zero Energy Buildings (e.g. multi-source ability, capacity range, capacity control, temperature lift)

Canada, Germany, Japan, the Netherlands, Norway, Sweden, Switzerland, and US.

Annex 39

A common method for testing and rating of residential HP and AC annual/seasonal performance

In this Annex, the following will be developed:
1) Common calculation methods for SPF using a generalized and transparent approach, based on lab measured data.
2) Establish comprehensive test methods based on further development of existing test standards. The test standards should include test conditions needed for the future SPF calculations.
3) A method to evaluate additional heat pump performance, e.g. Carbon Footprint, Primary Energy Saving or Energy Savings.

Austria, Finland, France, Germany, Japan, the Netherlands, South Korea, US, Sweden, and Switzerland

Annex 38

Systems using solar thermal energy in combination with heat pumps

The aim is to analyse solar and heat pump configurations with respect to energy savings and total cost of ownership (TCO) for investment and operation. 

Finland, France, Germany, Switzerland, and UK

Annex 37

Demonstration of field measurements on heat pump systems in buildings - Good examples with modern technology

Demonstrate the potential with heat pumping technology for all types of buildings from all ready performed field measurements. The focus will be on the best available technique.

- Demonstrate and disseminate
the economic, energy, environmental potential
with heat pumping technology. Calculate the
electricity consumption and energy savings,
compared to alternative ways of heating,
- Improve the understanding of key parameters
influencing the reliability and efficiency
of heat pump systems
- Develop a database from already performed
field measurements presented using a common
method to express such as seasonal efficiency
and energy savings.

Norway, Sweden, Switzerland, and UK

Annex 35

Application of Industrial Heat Pumps

The objective of the Annex is to reduce the use of energy and emissions of greenhouse gas emissions by the increased application of heat pumps in industry.

Austria, Canada, Denmark, France, Germany, Japan, the Netherlands, South Korea, Sweden


IEA Heat Pump Centre c/o SP Technical Research Institute of Sweden E-mail: