This style of boiler is a feature that is usually only still found in very old properties. The open-flue boiler was a heavy appliance and would not be suitable for location on a wall unlike the modern versions that are available. The air required for combustion to take place is huge and has to come from the surrounding area of the boiler. The fumes from the flue exhaust into the room and are not very safe or health friendly. An Edgeware Plumber is experienced in open-flued boilers and can advise on ventilation options. Fans to try and take the gases away from the property where fitted at the flue and also detection devices were fitted to cut out the boiler at the first sign of any gases that might be harmful, but the boiler still needed to be monitored even though these safety features had been added. Boilers have undergone great design and safety innovations in the last ten years. They now boast a first class safety and reliability record.Ventilation:Normally, extra ventilation is needed as the burner air is taken from and returned back into the same room. Edgeware Plumbers can fit extra ventilation if required for this type of boiler. Keeping a door open will not work as then, the house is cold and there is more demand for heating. People would gamble with their lives. The vents would be covered sometimes by things like sofas and chairs, so the vent could not escape to atmosphere. The more the ventilation was compromised, the worse the burning action of the boiler would be. This would almost certainly result in carbon monoxide production. The gas is odour free and taste free and is deadly if it is breathed in.