Boiler Flues Through Roofs

In cases where the boiler is not fitted to an external wall a vertical flue may be installed.

Boiler flues through roofs.

In a modern fan assisted condensing boiler the boiler flue could just as easily be described as an air flue gas duct as it has two separate channels for gases and serves two functions. That s because the combustion byproducts are in a gaseous form so the gases can float up through the flue pipe and out of your roof. You see if you ve got a boiler in your attic and the flue goes through the roof there s a chance it could get bashed or pulled on accidentally when you re up there. The engineer duly got in touch with hse.

To expel the boiler s exhaust gases into the outside air where they are dispersed in the atmosphere. In 2015 for example a contractor re roofing a flat roof above a flat in paignton devon was fined 2 000 plus legal costs for failing to reconnect a flue to the boiler. Flashing kits flashing plates and weather collars in the range can be made of sheet metal plastic or composite materials and. Boiler flue flashing products are typically used when installing a vertical flue kit through a flat or angled roof as it will provide a weather tight seal to the roof and stop any water leaking into the flue system.

The fault was only detected after the resident had contacted a gas safe engineer to inspect what they thought was a faulty boiler. Different flues and boilers sometimes have different specifications. A reputable engineer will follow manufacturer s instructions when fitting your vertical boiler flue with respect to the length and other things currently on your roof. Typically this applies when your boiler burns solid fuels.

With a horizontal flue the pipe travels straight through the wall behind the boiler. If your furnace has an afue rating below 90 percent it will most likely have a flue pipe that goes up through your roof. In this case the flue goes upwards and then out through the roof.