IEA HPT Annex 40

IEA HPP Annex 40 Bundesamt für Energie BFE IEA Heat Pump Centre iea International Energy Agency‌

IEA HPT Annex 40

IEA HPT Annex 40 is an international research project on heat pump systems for Nearly Zero Energy Buildings (nZEB) in the Heat Pumping Technologies (HPT), former Heat Pump Programme (HPP) of the International Energy Agency (IEA).
Presently, 9 countries are participating in the IEA HPT Annex 40.
Focus of this website is the actual state of the research on the national level within the framework of the IEA HPT Annex 40 and the broader information on the topics

  • National links to nZEB
  • Experience with heat pumps in nZEB
  • Design of HVAC systems for nZEB in different countries
  • Development and market situation of heat pump systems in nZEB

The website gives information on the IEA HPT Annex 40 project and publications
in the frame of IEA HPT Annex 40 as well as information to the topic of the Annex 40.


























12th IEA Heat Pump Conference
May 15-18, 2017, Rotterdam
Conference Website

Executive Summary and Final reports
The Executive summary and Final reports of the IEA HPT Annex 40 are available for download.

Download under Deliverables

Final workshop IEA HPT Annex 40 on REHVA World Congress CLIMA 2016

May 22-25, 2016, Aalborg
Workshop presentations

IEA HPT Annex 40 Workshop HP4NZEB final seminar
Finlandia Hall, Helsinki, Finland
June, 15, 2015
Workshop presentations

IEA HPT Annex 40 Workshop
on the 5th IEA HPT Annex 40 working meeting
Nagoya University, Japan
Nov 11, 2014
Workshop presentations

Joint Workshop IEA HPT Annex 40/NSERC
on the 11th IEA Heat Pump Conference 2014 in Montréal,
May 12, 2014, 9:00 - 17:00
Workshop presentation