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Why It Is Important To Have An Annual Gas Safety Check The law obliges landlords to have gas appliances and flues inspected by a Gas Safe engineer annually. This includes shared appliances, such as boilers. During the inspection, the engineer will examine the flue. If required it is necessary, he can take it apart. He'll also test each appliance for carbon monoxide. If an appliance is deemed 'Immediately Dangerous' the engineer will shut it down it. It is necessary to fix this issue before it can be used again. Gas Safety Certificates Gas is a popul