Ongoing projects

In this section information about the ongoing Annexes in the Heat Pumping Technologies 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 50

Heat Pump Systems in Multi-Family Buildings

The aim is to increase the use of heat pumps in multi-family buildings. The main objectives of this Annex would be to demonstrate possible energy savings and the utilisation of renewable energy by means of heat pumps in buildings retrofitted with heat pumps without improving the building envelope.

Contact: Marek Miara, marek.miara @

Austria andGermany.
The Annex is still open for new participants.

Annex 49

Design and Integration of Heat Pumps for nZEB (continuation of Annex 40)

This Annex "Design and Integration of HP4nZEB" is a continuation of Annex 40 "Heat Pump Concepts for Nearly Zero-Energy Buildings".

Contact: Carsten Wemhörner, cwemhoen @

Germany,Switzerland, and the US.
The Annex is still open for new participants.

Annex 48

Industrial Heat Pumps, Second Phase

The main goal of this Annex is to overcome still existing difficulties and barriers for the larger scale market introduction of industrial heat pumps.

The results should be concentrated on the development and distribution of condensed and clear information material for policy makers, associations and industries.

Focus will be concentrated on a limited number of process industries with large potential.

France, Germany, Japan, and UK.
The Annex is still open for new participants.

Annex 47

Heat Pumps in District Heating and Cooling Systems

The objective of this Annex is to gather information and ideas for policy makers and decision makers and planners of energy systems in urban areas concerning the possibilities and barriers related to the implementation of heat pumps in DHC systems.

The Annex is still open for new participants.

Annex 46

Domestic Hot Water Heat Pumps

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.

France, Japan, the Netherlands, South Korea, and UK.
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 gases 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.

France, Germany, the Netherlands, and UK.
The Annex is still open for new participants.

Annex 44

Performance Indicators for Energy Efficient Supermarket Buildings

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.

Denmark, 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.

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

Austria, Denmark, France, Germany, the Netherlands, South Korea, Switzerland, UK, and US.

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 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


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