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Technical
The IOR Safety Code of Practice for Non Flammable, Lower Toxicity Refrigerants (Group A1) has been updated by the IOR as a reference source and guide to interpretation of the latest standards and regulations.
The publication provides essential industry guidance for owners, designers, installers and operators of vapour compression refrigerating systems that use any
group A1 refrigerants which include HFC and HFC blends. It covers properties of refrigerants, decommissioning, testing and maintenance as well as design issues with useful appendices such as typical schedules for inspection and maintenance, system register details, machinery rooms, definitions and an updated list of relevant standards. The Code has been prepared by the IOR Technical Committee as a reference source and guide to interpretation of current safety standards such as BS EN378:2016 and legal requirements such as F Gas, PED, PSSR. The IOR publishes four Safety Codes of Practice specific to refrigerant type - all available free to IOR members.
The remaining Codes are under revision and are due to be reissued in April 2018.
- Non Flammable, Lower Toxicity Refrigerants Group A1
- Flammable Lower Toxicity Refrigerants Group A2L, A2 and A3
- Carbon Dioxide R744
- Ammonia R717
Download or purchase the Code here
Recent posts
New Technician Good Practice Guides Available
6 Nov 2025
Topics of the new bulletins include direct expansion water-to-refrigerant evaporators, electrical safe isolation and determining the wattage of electric heaters.
Publication
GB F Gas consultation launched by DEFRA
5 Nov 2025
The outcomes will be used to shape future legislation for our sector. Take part in this consultation to make the views of the RACHP industry heard. Industry groups will be coordinating a response through ACRIB (Air Conditioning and Refrigeration Industry Board).
News
Talk on the Future of Compressors Now Available
5 Nov 2025
The talk by Prof. Ahmed Kovacevic, FREng on emerging technologies in compressors and their systems is now available from the IOR website.
Recording
IOR’s Committees Share Achievements and Plans
3 Nov 2025
On 29 October, the IOR members met to share their reports on activity, plans and strategies for the future. Seven IOR committees met, including Membership, Education, Environment, Technical, Engineering Technician Group, Women in RACHP, and the Dinner Committee.
Live event
IOR 2025 Election Results Announced
29 Oct 2025
At the IOR Annual General Meeting held on 29 October 2025, election results were announced. Stephen Gill FInstR was voted President-Elect, and Stephen Benton FInstR together with David Bostock FInstR were elected as Trustees to the IOR Board.
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