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


The USA is represented by Oak Ridge National Laboratory (ORNL), the national Institute of standards and technology (NIST) and the Center of Environmental Energy Engineering (CEEE) of the University of Maryland.

National team leader

Van D. Baxter
Residential Building and Equipment Research
Engineering Science and Technology Division
Oak Ridge National Laboratory
P.O. Box 2008, Building 3147
Oak Ridge, TN 37831-6070
Tel: 865-574-2104
Fax: 865-574-9338
E-mail: baxtervd(at)

National team

Prof. Reinhard Radermacher, Ph.D.
University of Maryland
Department of Mechanical Engineering
Center for Environmental Energy Engineering (CEEE)
4164 Glenn L. Martin Hall
College Park, Maryland 20742
Tel: 301-405-5286
Fax: 301-405-2025
E-mail: raderm(at)

Piotr Domanski, Ph. D.
W. Vance Payne, Ph.D.
National Institute of Standards and Technologies NIST
Leader HVAC&R Equipment Performance Group
Building and Fire Research Department
100 Bureau Drive Stop
Bldg. 226, Rm. B116
Gaithersburg, MD 20899-8631
Tel: 301-975-5877
Fax: 301-975-8973
E-mail: piotr.domanski(at)

National project

In the US team three institutions are involved and will work on the following projects:

Oak Ridge National Laboratory (ORNL) has several integrated heat pump (IHP) systems developments. An electric ground-source (GS-IHP) and air-source (AS-IHP) versions and an engine driven AS-IHP version will be developed through a field demonstration testing stage. The first commercial GS-IHP product was introduced to the market in December 2012. This work is a contribution to Task 3 of the Annex.

The University of Maryland will contribute a software development project to Task 2 of the Annex. The software ThermCOM is to evaluate thermal comfort accounting for all radiative and convective heat transfer effects as well as local air properties.

The National Institute of Standards and Technology (NIST) is working on a field study effort on the NIST Net Zero Energy Residential Test Facility (NZERTF). This residential building was constructed on the NIST campus and officially opened in summer 2012. During the first year, approximately between October 2012 and September 2013, baseline performance of the NZERTF and all appliances will be monitored under a simulated occupancy protocol. During the first (baseline operation) year the house will be equipped with an ultra-efficient, air-to-air heat pump. Outdoor conditions, internal loads and modes of heat pump operation will be monitored. Field study results with respect heat pump operation will be reported and recommendation on heat pump optimization for a net-zero energy building will be provided. This work is a contribution to Task 3 of the Annex.

US technical contributions related to Task 4 of Annex 40 will mostly be related to the parallel work under the Annex 42 entitled heat pumps in smart grids and reported in Annex 40.

US links

US National IEA HPT website
Website of the national team of the USA in the IEA
Heat Pumping Technologies containing information
on the US activities within the program.
Website in English.

DOE Energy Efficiency and Renewable
Building Technologies Program
Website of the DOE Program including
publications, tools and information at

Air-Conditioning, Heating, and
Refrigeration Institute (AHRI)

AHRI is a voluntary, non-profit trade
association for manufacturers of air
conditioning, refrigeration, and heating products.

ASHRAE is a voluntary, non-profit engineering
society for HVAC&R engineers. It publishes
HVAC&R standards, guidelines, handbooks and
other educational material, sponsors HVAC&R
research, and conducts professional development
training seminars.

Energy STAR
ENERGY STAR is a joint program of the U.S.
Environmental Protection Agency and the U.S.
Department of Energy to promote use of energy
efficient products and practices.