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Robert Henninger



Principal Engineer


Building Energy Modeling, Energy Analysis, Software Testing


B.S.M.E., University of Illinois at Champaign/Urbana, 1964

M.S.M.E., University of Illinois at Champaign/Urbana, 1965


Mr. Henninger has over 40 years of experience in performing contract R&D and applications engineering programs concentrated in the principal areas of development and application of building and energy systems simulation/analysis software, commercial and industrial building energy efficiency studies, and testing of building energy analysis computer programs using standard test procedures.

Currently, Mr. Henninger is performing software testing for the EnergyPlus building energy analysis program being developed and maintained by the U. S. DOE.  Prior to each new release of EnergyPlus he runs a series of comprehensive validation tests to ensure that algorithm and source code changes have not introduced errors into results.  A series of standard test suites have been developed which include:

ANSI/ASHRAE Standard 140 Standard Method of Test for the Evaluation of Building Energy Analysis Computer Programs to test accuracy of various types of thermal envelope and fabric loads, space cooling equipment, and space heating equipment

ASHRAE 1052RP Analytical Building Fabric Tests to test accuracy of building fabric calculations

IEA BESTEST Multi-Zone Non-Airflow In-Depth Diagnostic Cases:  MZ320 – MZ360 to test accuracy of determining heating and cooling loads in multi-zone buildings

IEA BESTEST Airflow Test Cases including Multi-Zone which are comparative and analytical tests for determining airflow between zones driven by wind, temperature difference, and both combined

IEA Mechanical Equipment and Controls which are comparative and empirical tests for determining the performance of HVAC components in chilled-water and hot-water systems

IEA BESTEST Ground Coupling Tests GC30B thru GC80C which are comparative tests for testing the accuracy of heat transfer calculations for ground-coupled surfaces

Home Energy Rating System Building Energy Simulation Test (HERS BESTEST) to test the accuracy of modeling various features of a single-story house including passive solar design elements

HVAC Equipment Component Test Suite  which are comparative tests developed by GARD to test the accuracy of HVAC component simulation results compared to manufacturer catalog data

Global Energy Balance Test Suite  which are comparative tests developed by GARD to check the accuracy of energy balances at various boundary volumes when simulating the operation of HVAC systems and equipment

Mr. Henninger was project manager and principal investigator of GARD’s Commercial Building Systems Analysis contract with the Gas Research Institute.  Numerous energy and economic analyses and marketing studies were performed using the DOE-2 building energy analysis program to investigate the local and national cost effective application of gas cooling and dehumidification equipment to commercial buildings.

Mr. Henninger has conducted commercial and industrial energy engineering programs for such facilities as Main Post Offices, Bulk Mail Centers, Veterans Administration Hospitals, U.S. Army Arsenals, Ammunition Plants and Forts, U.S. Air Force hangars, the Naval Research Laboratory, NASA laboratory buildings, high schools, manufacturing plants, and multi-family residences.  Activities have ranged from walk-through audits to development of basewide energy management plans requiring field investigating of buildings, quantification of energy use patterns through metering and computer simulation, the identification and evaluation of energy conserving modifications, and life cycle cost analysis.

Mr. Henninger was also the principal investigator on U.S. Army Energy Engineering Analysis Programs and Energy Savings Opportunities Surveys conducted for the Rock Island Arsenal, Detroit Arsenal, Rocky Mountain Arsenal and Ft. McCoy.  The work involved managing a team of engineers who performed onsite surveys of hundreds of buildings, evaluated energy efficiency improvement retrofits and prepared programming documentation to implement cost effective modifications.


Witte, M.J., and R.H. Henninger, R.H., “Evaluating the Ability of Unitary Equipment to Maintain Adequate Space Humidity Levels (RP-1254),” ASHRAE Transactions, ASHRAE, Atlanta, GA, January 2010.

Witte, M.J., Henninger, R.H., and D.B. Crawley, “Development of New Self-Comparison Test Suites for EnergyPlus,” Proceedings SimBuild 2008, IBSPA-USA National Conference, Berkeley, CA, July 2008.

Witte, M.J., and R.H. Henninger, ASHRAE 1254-RP Evaluating the Ability of Unitary Equipment to Maintain Adequate Space Humidity Levels, Phase II, Final Report, ASHRAE, May 2006.

Witte, M.J., Henninger, R.H., and D.B. Crawley, “Experience Testing EnergyPlus with the ASHRAE 1052-RP Building Fabric Analytical Tests,” Proceedings, SimBuild 2004, IBSPA-USA National Conference, Boulder, CO, August 2004.

Henninger, R.H., Witte, M.J., and D.B. Crawley, “Analytical and Comparative Testing of EnergyPlus using IEA HVAC BESTEST E100-E200 Series,” Energy and Buildings, 36 (2004), pp. 855-863, 2004.

Henninger, R.H., Witte, M.J. and Crawley, D.B., Experience Testing EnergyPlus with the IEA HVAC BESTEST E100-E200 Series, Proceedings, Building Simulation 2003, International Building Performance Simulation Association (IBSPA), Eindhoven, Netherlands, August 2003.

Witte, M.J., Henninger, R.H., Glazer, J., and D.B. Crawley, “Testing and Validation of a New Building Energy Simulation Program,” Proceedings, Building Simulation 2001, International Building Performance Simulation Association (IBSPA), Rio de Janeiro, Brazil, August 2001.

J. Glazer, T.L. Cornell, R.H. Henninger, and R.L. Hedrick, Energy Savings of the ASHRAE Standard 90.1 Revision, Gas Research Institute Topical Report, GRI-00/0116, August 2000.

R. H. Henninger, et al.  Engine-Driven Heating and Cooling Equipment, Chapter 47, HVAC Systems and Equipment, ASHRAE Handbook, 2000.

Natural Gas Engine Chiller Ready Reference Guide, GRI-99/0147, June 1999.

R. H. Henninger, et al, Commercial Gas Cooling: An Investment Opportunity, Topical Report, GRI-97/0140, March 1997.

M. J. Witte, J. Glazer, R. H. Henninger, Market Opportunities for Applied Natural Gas Engine-Driven Hybrid Chiller Plants, Final Report, GRI-97/0026,January 1997.

R. H. Henninger, High Efficiency Gas Heating Initiative Technology Economics, Consortium for Energy Efficiency, GARD Project No. CE-275, May 1997.


Past Chair of ASHRAE Technical Committee 7.4 – Combustion Engine-Driven Cooling and Heat Pump Equipment

Past Member of the ASHRAE Technical Committee 4.7 – Energy Calculations