IEA HPT Annex 55: Comfort and Climate Box – Speeding up market development for integrating heat pumps and storage packages

In the IEA HPT Annex 55, heat pumps with integrated thermal/electrical storage systems for existing buildings that are as close to the market as possible will be developed. Furthermore, measures to accelerate market development will be worked out.

Short Description

Integrated systems consisting of heat pumps and thermal/electrical storage, so-called Comfort and Climate Boxes (CCBs), are a good option for significantly increasing the share of renewable energy in the building sector (heating and cooling). A CCB should not simply connect individual components. Rather, all components of a CCB should be designed to work together in a modular and optimally coordinated way. This also requires a control and regulation strategy that is optimally integrated into the CCB and especially tailored to the CCB.

The aim of Annex 55 is to develop CCBs for existing buildings that are as close to the market as possible and to work out measures to accelerate market development. The Austrian Consortium will evaluate the national market, evaluate data from laboratory tests and monitoring projects, calculate annual/seasonal efficiencies and identify market barriers together with relevant stakeholders.

This Annex is a joint project with the Mission Innovation Challenge 7: Affordable Heating and Cooling of Buildings.

Project Images

Terms of use: The pictures listed underneath the header “Project Pictures” originate from the projects in the frame of the programmes City of Tomorrow, Building of Tomorrow and the IEA Research Cooperation. They may be used credited for non-commercial purposes under the Creative Commons License Attribution-NonCommercial (CC BY-NC).


Austria, Canada, Italy, Netherlands

Contact Address

AIT Austrian Institute of Technology GmbH, Center for Energy
Project manager: Johann Emhofer
Project staff: Steffen Robbi, Therese Guttmann
Giefinggasse 2, 1210 Wien
Tel.: +43 (0) 50550-6061

Fachhochschule Burgenland GmbH
Project manager: Christian Heschl
Campus 1, 7000 Eisenstadt
Tel.: + 43 5 7705-4121

Graz University of Technology, Institute of Thermal Engineering
Project manager: Andreas Heinz
Inffeldgasse 25/B, 8010 Graz
Tel.: +43 (0)316 873-7313

University of Innsbruck, Unit for Energy Efficient Buildings
Project manager: Fabian Ochs
Project staff: Georgios Dermentzis
Tel.: +43 512 507 63603