See figure j3 for clearances required from a flue terminal to an lp gas cylinder.
Flue height above roof nz.
If the flue exits the roof further down then it must extend high enough to acheive 2 3m of horizontal clearance.
The top of the flue system should be at least 1000mm above 4 2 metres from above flue collar panel to top of flue pipe the roof or at least 600mm higher than any obstacle or ridge within 3 metres of the flue.
The height of any chimney covered by b1 as3.
The minimum height of the top of the flue varies depending on where it is on the roof.
Chimneys shall not cantilever more than 2 4 m above the fixing at roof level and need to be within the size limits of b1 as3 paragraph 1 1 3.
Measured from the top of the chimney foundation slab to the top of the chimney stack shall not ex ceed 9 m.
When installing a new twinwall flue system if the flue exits the roof within 600mm horizontally from the ridge high point of the roof then the flue must extend a minimum of 600mm above the ridge.
The flue pipe shall extend not less than 4 6m above the top of the floor protector.
If the flue is over 3 m from the roof apex the flue top must be 1 000 mm minimum above the roof and at least 3 m horizontally from.
Flues need to be 600mm higher than the highest part of the roof within 3 metres.
Homes built on varying terrain have their own set of chimney and flue regulations.
Design standards assist in limiting emissions of harmful pollutants such as carbon monoxide volatile organic compounds hydrocarbons toxins and dioxins.
As nzs2918 2001 4 9 1 a states the flue pipe shall extend not less than 4 6m above the top of the floor protector.
However a total minimum vertical height above the wagener.
Ceiling and protrudes through the roof the required height.
See clause 6 9 4 for restrictions on a flue terminal under a covered area.
This is a bit of an odd measurement and chimney clearance case because the chimney side is actually about 8 away from the roof edge.
Solid fuel heaters and fireplaces are the main cause of domestic air pollution in most new zealand towns and cities.
A lf the flue pipe is within 3 metres of the ridge the flue pipe must protrude at least 600mm above the ridge of the roof.
Ii sufficient overall height to encase the flue pipe which must extend a minimum of 4 6m from the floor protector.
If the flue is within 3 m horizontally of the roof apex the flue top must be at least 600 mm above the roof apex.
Note that the inner casing should extend 200mm above roof.
How high does the flue have to go.
A flue terminal is considered to be a source of ignition.
Flues that are more than 3 metres away from the highest part of the roof need to be 1000mm above the flue penetration.
I the correct minimum roof penetration height.
The height of the chimney above the roof surface measured at the up slope side of the chimney from the roof surface to the chimney top should be at least three feet the green line in our photo.
For appliances not addressed above acceptance should be obtained from the technical regulator.
