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8 THE FLUE SYSTEM
8.1 General
The flue system, acts as the engine that drives your wood heating system. Even the best zero clearance
wood inbuilt will not function safely and efficiently as intended if it is not connected to a suitable flue
system.
The heat in the flue gases that pass from the zero clearance wood inbuilt into the flue system is not waste
heat. This heat is what the flue system uses to make the draft that draws in combustion air, keeps smoke
inside the zero clearance wood inbuilt and safely vents exhaust to outside. You can think of heat in the flue
gas as the fuel the flue system uses to make draft.
8.2 Minimum Flue System Height
The top of the flue system should be tall enough to be above the air turbulence caused when wind blows
against the house and its roof.
The flue exit shall be located outside the building in which the appliance is installed so that:
a) The flue shall extend not less than 4.6 m above the top of the floor protector;
b) The minimum height of the flue system within 3 m distance from the highest point of the roof shall
be 600 mm above that point;
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Flue heights and lengths from AS/NZS 2918:2001
OPERATING & INSTALLATION INSTRUCTIONS FOR STRATFORD CF ZERO CLEARANCE WOOD HEATER
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