EN378 refers to Refrigerating Systems and Heat Pumps & the continuous leak monitoring of the system.

EN378 Safety and Environmental Requirements requires the installation of fixed leak monitors in refrigeration and air-conditioning machinery rooms. However, it goes significantly further than earlier standards world wide by including the special requirement to ensure safety in air-conditioned spaces in Category A occupancy buildings if a sudden leak into an occupied space would exceed specified concentrations. Typically, this could occur with direct expansion split systems.

Category A buildings include those that have restricted movement such as dwellings, residential institutions (hotels, hospitals, prisons, schools) and public places such as courts, theatres, public transport termini, supermarkets, restaurants, etc. Installation of appropriate gas leak detectors in such buildings should meet the requirement of EN378.

The BBC can help you comply with these regulations by carrying out an investigation of your existing systems

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