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Why a Gas Safe Heating Engineer is a Legal Requirement Gas engineers work on a variety of appliances and are able to help you troubleshoot problems with your boiler. They will be able to spot and fix any issues swiftly and effectively. Gas Safe heating engineers are essential for the security of your home, since they can reduce the risk of carbon monoxide poisoning and gas leaks. The majority of home insurance policies require that any gas-related work is performed by a registered engineer. Qualifications