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Energy and Environment Directorate

Christian Ellington Kaltreider

Christian Ellington Kaltreider

(509) 372-4372


Christian Kaltreider joined PNNL in 2022, with 15 years of prior experience working in energy efficiency, renewable energy, and residential construction. He is currently supporting the development of new content for the Building America Solution Center.

Before joining PNNL he worked as an engineering consultant on energy savings performance contracts, net-zero energy projects, and high-performance HVAC design efforts. He holds a master's degree in building systems engineering from the University of Colorado at Boulder, and a bachelor's degree in physics from the University of North Carolina at Asheville. Prior to his university studies Mr. Kaltreider worked in residential construction for 5 years, gaining hands-on experience with every phase of the construction process. His interests and expertise include building science, HVAC systems and controls, renewable energy, passive solar building design, biomass heating, and low-tech innovation. He was awarded U.S. Patent #11026500 as sole inventor in June 2021.

Christian lives in Asheville, NC with his wife and two children. He enjoys gardening, canoeing, trail running, and mountain biking in the Blue Ridge Mountains surrounding his home.

Research Interests

  • Residential and commercial building energy efficiency
  • Building science
  • HVAC controls logic
  • Renewable energy
  • Biomass heating

Education and Credentials

  • B.S., Physics, University of North Carolina at Asheville, 2008
  • M.S.E., Architectural Engineering, University of Colorado at Boulder, 2011
  • FE/EIT

Affiliations and Professional Service

  • ASHRAE Member

PNNL Publications


Energy and Environment

Core Research Areas