Overview
Personal Profile
Jon Winkler is a senior researcher in the Advanced Buildings Equipment Research Group. Winkler’s research is focused on residential heating, ventilating, and air-conditioning (HVAC) systems, including installation quality and fault detection and diagnostics, cold-climate heat pumps, dehumidification systems, high-performance home cooling and heating loads, occupant thermal comfort, and building energy modeling. Winkler leads multiple types of projects, spanning national scale modeling analysis, field demonstrations, and laboratory investigations.
Prior to working at NLR in 2009, Winkler was a faculty research assistant in the Mechanical Engineering Department at the University of Maryland, where he co-led the development effort of vapor compression system simulation and optimization software used by HVAC manufacturers.
Research Interests
Residential heating, ventilating, air conditioning, and dehumidification systems
Residential air conditioner and heat pump installation quality
High-performance home cooling and dehumidification loads
Cold-climate heat pumps
Occupant thermal comfort
Building energy modeling
Residential equipment performance mapping
Education/Academic Qualification
Bachelor, Integrated Science and Technology, James Madison University
PhD, Mechanical Engineering, University of Maryland
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Collaborations and Top Research Areas From the Past 5 Years
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Cold Climate Field Study of the Effect of Defrost Controls on the Integrated Performance of a Ductless Air-Source Heat Pump: Article No. 733
Munk, J., Marsik, T., Truffer-Moudra, D., Stevens, V., Dennehy, C., Winkler, J. & Strunk, R., 2026, In: Energies. 19, 3, 16 p.Research output: Contribution to journal › Article › peer-review
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Minimizing Auxiliary Heat Use for Cold Climate Operation of Air-Source Heat Pumps
Ramaraj, S. & Winkler, J., 2025, 20 p.Research output: NLR › Presentation
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Minimizing Auxiliary Heat Use for Cold Climate Operation of Air Source Heat Pumps: Preprint
Ramaraj, S. & Winkler, J., 2025. 12 p.Research output: Contribution to conference › Paper
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Cold Climate Air-Source Heat Pump Demonstration and Analysis: Experimental Study on Cold Temperature Performance
Winkler, J. & Shoukas, G., 2024, 51 p.Research output: NLR › Technical Report
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Impact of Refrigerant Undercharge Faults on Building Indoor Conditions and HVAC System Operation in Residential Buildings: A Simulation Study: Article No. 114667
Yoon, Y., Im, P., Winkler, J. & Munk, J., 2024, In: Energy and Buildings. 321, 15 p.Research output: Contribution to journal › Article › peer-review
5 Scopus Citations