ABOUT 2023-08-25T13:23:31+10:00





Hems International has developed a revolutionary, hydrogen based Emission and Fuel Reduction System that reduces emissions, fuel consumption and overall operating costs.
The Hems System has been independently tested and proven to reduce emissions and fuel consumption by one of the World’s leading Environmental Testing facilities in Austria and Germany. (UWS Environmental, Dr Walter Stoltz)

The HEMS Hydrogen Based Emission Reduction System uses compressed hydrogen, controlled and introduced into the air inlet, by the Hems patented control and delivery mechanism. Just a small amount of hydrogen promotes a better combustion process. This improves the thermal efficiency of the engine and fuel, with the added benefit of lesser harmful emissions and fuel consumption.

The fuel and emission figures and percentages quoted in this website are based upon the results of the Austrian and German trials over a period of time.

Hydrogen Based Diesel Reduction System on HEMS bus


HEMS International is an Australian based, innovative technology  business that has developed the HEMS Hydrogen Based Emission Reduction System, located in Sydney, Australia and has been established since 2010.

The name of our company is based upon the technology that we use: Hydrogen Emission Management Systems (HEMS).

The HEMS team have over 60 years of knowledge and expertise in the transport sectors and Internal Combustion Engine (ICE) mechanical and associated systems.

Over the last several years, the Research and Development team at Hems International have been refining and testing the means to improve the thermal efficiency, improve the fuel economy and environmental impact of the Internal Combustion Engine (ICE)  by using a Hydrogen based fuel enrichment system, with a patented control and delivery system.

The system has been independently certified as compliant with Australian and International Standards applicable to registered light and heavy motor vehicles.

The HEMS System has been subjected to extensive trials here in Australia and in Europe and is the only proven hydrogen based diesel reduction system.

Where do we fit in?

As more and more emphasis and legislation is being placed on vehicle emissions as well as the cost of fuel, the HEMS system enables operators of vehicles to address some of the issues that they face in the day to day operation of their fleet.

Heavy freight transport activity is generally expected to increase in-line with population growth and economic activity.

To meet demand, most of the diesel consumed in Australia is imported and is subject to regional based pricing. Diesel costs are a significant operational costs for fleet operators. The volatility of diesel prices can significantly affect the profitability of a business.

According to the Tracking 2020 Report (published Dec 2015 by Dept of Environment, Australian Government), the transport and haulage sector which includes articulate trucks, rigid vehicles and light commercial vehicles is expected to increase to ~ 38 Mega tonnes of Carbon (MtCOe) annually (approximately 40% of total transport emissions).

Diesel is projected to remain as a primary fuel for the industry being the least cost fuel in the foreseeable future.


William MatarCEO/Director
William is a founder of HEMS International and the originator of the HEMS System. He has worked in the transport and hospitality industry for over 24 years and has completed bus and coach management courses at The University of Sydney. William is an active member of the Institute of Automotive Engineers and is one of the designers of the HEMS System.
Sean BartlettSpecialist - Integrated Logic Programming
Highly experience programmer and Electrical Engineer.
Michael RedfordDirector, Electrical Engineer amd Production Manager
Michael is a electrical project engineer of HEMS International. He is an Electrical Engineer with over 25 years of experience in Project Management and Technical Solutions. Projects he has worked on include Apple, Telstra and Netcomm. Michael is also a Novell System Analyst and Data Communication Specialist, with extensive product design and production management experience. Michael is one of the design team of the HEMS System in the electronics arena.
Mark BenjaminSpecialist - Integrated Logic Controller Design
Mark is one of the key personnel involved in the design of the electronic logic controller system architecture and board design
Russell HillDirector, Quality Manger & Systems Engineer
Russell is a mechanical project engineer of HEMS International. He is a trade qualified and Licenced aircraft engineer in aircraft airframe, systems and engines. He has been been in the aviation industry for over 40 years as an aircraft engineer. Russell is also a member of the Institute of Automotive Mechanical Engineers (IAME) and during this time he has run his own mechanical workshop for cars, buses and trucks. Russell has also held the position of Quality Manager  for a manufacturing company in the aviation industry. He was instrumental in obtaining regulatory approvals for Quality Management Systems as well as approved training courses for engineers and trade apprentices.


Dr Hien LySpecialist Consultant - (BE,Mech, Phd (Engineering))
Hien Ly holds the degrees of Bachelor of Engineering (BE, Mech.) and Doctor of Philosophy (PhD) in Engineering from the University of Auckland, New Zealand. He has worked for more than 30 years for the largest gas utilities and as a consultant in New Zealand, Australia. He has also undertaken independent consulting work in Singapore, Malaysia, Thailand and Indonesia. His work has included gas transmission and distribution network design, construction and operation, technical research and development, commercial development, and standards and regulations. His clients have included the energy utilities, international NGV (natural gas vehicle) industry bodies and Asian governments and companies.

Dr Ly is a member of the Standards Australia and ISO committees on gas cylinders, natural gas vehicle installation standard, gas vehicle workshops, and gas quality and Chairman of the Standards Australia Committee for CNG refuelling stations.

Dr Hien Ly is a founder of Clean Fuels Services International