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BS EN378:2016 Summary of Changes (IOR GN29)

January 2017

This Guidance Note explains the role of the BS EN378 “Refrigerating systems and heat pumps ? Safety and environmental requirements” safety standard and highlights the most significant changes introduced since the last version was published in 2008.


The IOR publishes a set of Safety Codes of Practice which provide guides to the practical interpretation of the standards based on the choice of refrigerant. They are available free to IOR members and can be purchased by non-members: Flammable Lower Toxicity Refrigerants; Non Flammable Lower Toxicity Refrigerants; Ammonia Refrigerant; Carbon Dioxide Refrigerant. The Codes are currently under revision and will be republished in spring of 2017.

The four parts of the full standard BS EN378:2016 are now available for purchase from BSI at


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