Welcome to the Project 64 of HPT TCP
The ultimate goal of the Annex is to contribute to a broader safe use of flammable refrigerants. The objective is that the findings generated in the Annex will be used as background information when regulations regarding the use of flammable refrigerants are updated. The expected outcome is a set of recommendations for updates of the regulations.
01 April 2023 -
31 December 2026
Lead country: Sweden
Participating countries: Austria, France, Germany, South Korea, USA
News About Project 64.
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IEA HPT Project 64 Webinar on the safe use of flammable refrigerants
Hydrocarbons, and propane (R-290) in particular, are on track to become the standard refrigerant across several heat pump sectors in Europe. The shift is driven by the F-Gas Regulation and REACH, and by the low global warming potential of natural refrigerants. It also brings flammability to the centre of system...
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IEA HPT Project 64 Webinar — Flammable Refrigerant Safety
🗓️ 25 June 2026 | 13:00 – 14:30 CEST | Online Hydrocarbons, and especially propane, is about to become the standard refrigerant in some of the heat pump sectors in Europe. Due to the flammability, safety is always a concern with these fluids. In this webinar, we are reporting on...
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New book on safety with propane as refrigerant
Our Austrian colleagues, Stig Rath and Harald Erös recently published a book entitled PROPANE, NATURALLY SAFE! According to the authors, this is the first book that provides a complete overview of regulations, standards, and best practices regarding fire and explosion hazards in refrigeration, air conditioning and heat pump systems.
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Project 64 at European Heat Pump Summit
At the European Heat Pump Summit, Project 64 was presented in a special session with in total of four presentations. First Björn Palm presented the Project as a whole, its purpose and its activities in general. Then Thore Oltersdorf gave a presentation on leak hole sizes in plate heat exchangers...