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William M. Healy

Group Leader

Dr. William M. Healy is the leader of and a supervisory mechanical engineer in the Heat Transfer and Alternative Energy Systems Group of the Energy and Environment Division (EED) of the Engineering Laboratory (EL) at the National Institute of Standards and Technology (NIST).

Dr. Healy joined the Heat Transfer and Alternative Energy Systems Group in March 1999 and assumed the duties of Group Leader in 2007. In addition to leading the group, he also manages the Net-Zero Energy, High-Performance Buildings Program. His current research interests involve evaluation of the performance of net-zero energy homes, the development of improved test methods and metrics for assessing the performance of water heating systems, and the use of advanced sensing and data analytics for determining energy performance. Dr. Healy has also investigated improved sensing methods for determining the moisture content within building envelopes. As a result of this effort, he and his collaborators were awarded a patent on the use of ultra-wideband radar to map the moisture state of a wall. Additional efforts have included support of the guarded hot plate development through finite element modeling and participation in efforts by the Department of Homeland Security to develop the infrastructure to allow for data from sensors to be propagated to applications that require knowledge of hazard levels.

Dr. Healy is a member of the American Society of Mechanical Engineers (ASME) and the American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE). He is the immediate past chair of ASHRAE Technical Committee 6.6: Service Water Heating Systems and serves as a voting member on Standard Project Committees 118.2 (Method of Test for Rating Residential Water Heaters) and 146 (Method of Testing and Rating Pool Heaters).  He has served as a voting member on ASHRAE TC 7.5: Smart Building Systems and ASHRAE TC 4.4: Building Materials and Building Envelope Performance.  He is also an instructor in the Johns Hopkins University Engineering for Professionals program, where he has taught courses in Thermal Systems Design and Analysis, Applied Heat Transfer, and Scientific Computing.



Jacob Rabinow Applied Research Award (2016)

Department of Commerce Energy and Environmental Stewardship Award (2013)

ASHRAE Technical Paper Award (2012)

Department of Commerce Silver Medal (2009)



Measurement Science Research Needs for Premise Plumbing Systems

Andrew K. Persily, David A. Yashar, Natascha S. Milesi-Ferretti, Tania Ullah, William M. Healy
Premise plumbing systems provide key building services and exist in the context of a range of performance goals related to building energy efficiency, water
Created October 9, 2019