If your furnace has an afue rating of 90 percent or above it will have a flue pipe that goes out of the side of your house.
Flue through roof space.
Vent pipes provide this air by running outside the structure of the house.
450 mm 18 in.
As placement of the vertical flue is more complex and convoluted than a standard horizontal flue it is more costly.
The metal furnace flue extends vertically through the closet ceiling through the attic and roof.
Where twin wall flue passes through a cupboard storage space or roof space a guard should be placed around it.
A flue pipe must never pass through a combustible floor or ceiling or through an attic roof space closet or concealed space.
If your boiler flue has to face out onto a public space the installer will have to ensure that it s fitted at least 2 1 metres above ground level over head height.
This article series describes b vent metal chimneys used for gas fired appliances.
This guard should be further away from its designated distance to combustibles.
Minimum clearance from combustible material.
We discuss fire safety fire clearances and other gas appliance venting details for b vent chimneys.
This ensures correct operation of the burner limits back draughts and prevents flue gases impinging on the roof.
Running a vent pipe out of the roof takes some careful preparation.
In a through the brick and inner flue installation for a six inch.
When passing through the roof you need to use a flashing that matches the roof pitch.
When water drains air must replace the space that was taken up by the water.
The first is known as an air cooled chimney system.
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.
The vertical flue at the ceiling level is surrounded by and attached to a horizontal piece of open 1 2 x 1 2 metal mesh screen about 10 square.
In this case the flue goes upwards and then out through the roof.
The minimum clearance may be reduced by 50 percent to 225 mm 9 in if suitable shielding is installed either on the pipe or on the combustible surface.
Twin wall flue boxing in in document j page 24 25 when do you have to box in twin wall flue pipe.
Type b vents ceiling floor wall clearances b vent clearances to combustibles clearance distances for a b vent to combustible materials in floors walls ceilings attics roofs.
Roof apex the flue top must be at least 600 mm above the roof apex.
Vertical flues the majority of boiler flues exit out of a wall horizontally but if the flue from your boiler comes out at roof level then there are also some regulations that.
Space between the chimney walls allows for outside air to flow freely.
As the name implies air cooled systems use air for cooling.
