B if the distance from the ridge is more than 3 metres the flue pipe must protrude at least 1000mm above roof penetration.
Flue height above roof nz.
The enclosure can be extended to meet the 600 mm or 1 000 mm height requirement but there is no guidance in as.
This ensures correct operation of the burner limits back draughts and prevents flue gases impinging on the roof.
The flue pipe shall extend not less than 4 6m above the top of the floor protector.
Flues need to be 600mm higher than the highest part of the roof within 3 metres.
April 2012 nz metal roof and wall cladding code of practice table of contents v 2 2 page 3 table of contents 1 1 0 table of contents 2 0p erformance 3 0 construction load 4 0 d esign 5 0f lashings 6 0p enetrations 7 0i nstallation 8 0 roof drainage 9 0 plastic roof lighting 10 0 pressed metal tiles.
Checked the flue height above the roof is indicated and that it meets the height requirements set out in as nzs 2918 2001 domestic solid fuel burning appliances installation inspection of the installed heater.
Homes built on varying terrain have their own set of chimney and flue regulations.
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.
New zealand metal roofing manufacturers inc.
If the flue exits the roof further down then it must extend high enough to acheive 2 3m of horizontal clearance.
Flues that are more than 3 metres away from the highest part of the roof need to be 1000mm above the flue penetration.
Refer to diagram c.
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 the roof surface.
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.
How high does the flue have to go.
A vertical line drawn along the up roof side of the chimney from the roof surface to the top of the chimney flue opening shall be at least 3 ft in height.
For an enclosure simulating a chimney this raises the question of how high above the enclosure to terminate the flue.
The top of the flue opening should be 3 ft 0 92 m above any roof surface.
C the flue pipe must be more than 3 metres from any nearby structure.
Refer to diagram b.
This is for masonry chimneys.
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.
