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Why is ventilation important?

Gas appliances need a continuous supply of fresh clean air for safe and efficient operation. In its simplest form, gas appliance are of one of three types – either open-flued, room-sealed or flueless.

• Room-sealed appliance take their air for combustion via the flue system and as their name implies, have their combustion process sealed from the room in which they are installed. The flue system, which typically terminates on an outside wall (they can also terminate in a vertical position i.e. on a roof) is of a concentric pipe system with the inner most pipe expelling products of combustion to the external atmosphere, whilst the outer pipe supplies combustion air into the appliance. Continue reading →