Shaping Tomorrow's Built Environment Today

Presenter Biographies

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Sarah Kim, Ph.D.

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Sarah Kim is a scientist working on next generation low GWP refrigerant development. She has been with the Arkema Fluorochemicals R&D department for 4 years as project leader of HVAC&R applications focusing on the evaluation of refrigerant performance, chemistry, and safety aspects.

Sarah is also an active member of ASHRAE. She is a voting member and chair of Designation & Nomenclature subcommittee of Standard 34 and involved in numerous technical committees of section 3, materials and processes.

Sarah received her Bachelor of Science degree in chemical engineering from Korea University and PhD in chemical engineering from Georgia Institute of Technology. Her thesis work was on the topic of environmentally friendly working fluids for absorption refrigeration applications utilizing waste heat.


Stephen "Steve" Kujak

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From refrigerants to air conditioning and refrigeration product development, Steve Kujak has spent over 26 years being involved in numerous technology and product development projects involving development of new refrigerants, lubricants, compatibility of system materials and environmental sustainability initiatives. Steve holds Bachelor of Science in chemistry from the University of Wisconsin-La Crosse and a master’s degree in analytical chemistry from the University of North Dakota. Steve has been an author or co-author on greater than 30 publications related to refrigerants and has 8 patents related to HVAC products, including a number refrigerant composition patents related to R410A alternatives. 

Steve has been member of ASHRAE since 2006 and is a distinguish service member of ASHRAE. His ASHRAE and industry activities include contributing to refrigerant safety and use standards.  He the vice chair of ASHRAE Standard 34 “Designation & Safety Classification of Refrigerants”, which includes also serving as the toxicity subcommittee chair for the last 7 years.” He is a member of Research Administration Committee (RAC) and a past chair for T.C 3.1 “Refrigerants and Secondary Coolants. Outside of ASHRAE, he is involved with AHRI and is participating in the Alternate Refrigerant Evaluation Program (AREP) and the ARTI Flammability Research Subcommittee. He was awarded the ASHRAE Crosby Field award for highest rated presentation of a technical paper in 2016 and was also awarded the George Briley Refrigeration Committee award for best ASHRAE journal article on refrigeration in 2017.

Now, as a director of next generation refrigerant research at Ingersoll Rand, he leads a cross function team of technologists working on low global warming refrigerant technologies. In this capacity, Steve delivers refrigerant technology innovations for Trane, Thermo King and Ingersoll Rand air compressor divisions. His hobbies include outdoors activities, like gardening, fishing, hunting and camping with his family and is involved in local organizations working on environmental conservation minded projects. 


Douglas Tucker

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Doug Tucker, a 30-year veteran in the fields of standards development, conformity assessment, and regulatory policy of HVAC&R equipment, is employed by Mitsubishi Electric US Cooling & Heating (MEUS) as Director of Industry and Government Relations. In this role he represents the interests of MEUS with federal, state and local governmental organizations, with industry trade groups and regulatory bodies, and with energy efficiency advocacy groups. Doug also ensures that Mitsubishi Electric products comply with applicable industry, federal agency and state codes and standards.

Prior to joining Mitsubishi Electric in 2014, Doug directed the international standards activities of ASHRAE, managing the development of ISO standards for indoor environmental quality, refrigeration & air-conditioning, and solar thermal applications.  As staff liaison, he was also responsible for ASHRAE Standard 15, Safety Standard for Refrigeration Systems, and ASHRAE Standard 34, Designation and Safety Classification of Refrigerants. Preceding his 15 years with ASHRAE, Doug was engaged for over 10 years in various engineering and management roles with Intertek/ETL Testing Laboratories.

Doug currently serves on ASHRAE SPC 15.2, Safety Standard for Air-conditioning and Heat Pump Systems in Residential Applications, ASHRAE SSPC 90.1, Energy Standard for Buildings Except Low-Rise Residential Buildings, ASHRAE GPC 41P, Design, Installation and Commissioning of Variable Refrigerant Flow (VRF) Systems, ASHRAE MTG - Lower Global Warming Potential Alternative Refrigerants, the Green Building Initiative Consensus Body for ANSI/GBI 01, Green Building Assessment Protocol for Commercial Buildings, and on various committees of the Air-Conditioning, Heating, and Refrigeration Institute (AHRI). He was recently appointed to the US Department of Energy Variable Refrigerant Flow Multi-Split Air Conditioners and Heat Pumps (VRF Multi-Split Systems) working group.

He received his Bachelor of Mechanical Engineering from the Georgia Institute of Technology and his MBA in International Business from Georgia State University, and has held a Professional Engineer license in Georgia and Florida.

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