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A3 Refrigerant R290 leak and ignition testing in whole room scale.

Number: 1040

Author(s) : WANG X.


R290 (propane) is a class A3 refrigerant having extremely low Global Warming Potential (GWP). Its application is currently limited to small charged self-contained air-conditioning and refrigeration products in most of the world due to its flammability and safety implications. Relevant product safety standards (IEC/UL-60335-2-40 and IEC/UL-60335-2-89) are looking into increase A3 refrigerant charge limits.
To properly address R290 charge quantities in safety standards, the Air-Conditioning, Heating, and Refrigeration Technology Institute undertook R290 leak and ignition tests under whole room conditions. This paper summarizes R290 test results at current and proposed allowable charge levels for air-conditioning and refrigeration products. The test demonstrated that raising the charge limit should be carefully considered especially for floor or near floor mounted products. Any potential ignition sources should be avoided underneath installed units and near the projected area at floor level. Air circulation had a positive effect in reducing the likelihood of an ignition event.

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  • Original title: A3 Refrigerant R290 leak and ignition testing in whole room scale.
  • Record ID : 30027905
  • Languages: English
  • Subject: HFCs alternatives
  • Source: 14th IIR-Gustav Lorentzen Conference on Natural Refrigerants (GL2020). Proceedings. Kyoto, Japon, December 7-9th 2020.
  • Publication date: 2020/12/07
  • DOI:
  • Document available for consultation in the library of the IIR headquarters only.


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