A new HVAC guide addresses refrigerant selection and safety considerations for flammable A2L and A3 gases used in modern domestic and commercial heat pumps.
A new technical guide covering the selection and handling of flammable refrigerants in HVAC and refrigeration applications has been released. The publication outlines crucial factors engineers and installers must evaluate when working with modern heat pumps and cooling systems using lower-GWP (Global Warming Potential) gases.
As regulatory pressure shifts the market away from traditional hydrofluorocarbons (HFCs), the adoption of flammable and mildly flammable alternatives—such as R32 (A2L) and R290 propane (A3)—has accelerated across UK domestic and commercial installations.
The guidance focuses on risk mitigation during system specification, installation, and ongoing maintenance. Highly flammable refrigerants like propane demand strict compliance with charge limits, ventilation requirements, and spark-proof equipment standards to prevent accidental ignition during servicing.
What does this mean for a UK tradesperson or DIYer actually buying this kit — does it change what they should pay, buy, or watch out for?
Plumbers, heating engineers, and AC technicians moving into heat pump installation will need to audit their existing toolkits before taking on A2L or A3 refrigerant work. Standard recovery units, vacuum pumps, and leak detectors designed for non-flammable gases like R410A are unsafe for A3 propane systems. Installers purchasing gear from trade merchants must invest in ATEX-certified or non-sparking equipment, which commands a higher purchase price but is mandatory for compliance and safety on site.
Reported by PHPI Online — original article
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