Minimum Flue System Height; The Relationship Between The Flue System And The House; Why Inside Flue Systems Are Preferred - Ecomaxx HT-2000 Operating & Installation Instructions Manual

8.3 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 pipe 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;
c) The minimum height of the flue system further than 3 m from the highest point of the roof
shall be 1000 mm above roof penetration;
d) No part of any building lies in or above a circular area described by a horizontal radius of 3
m about the flue system exit.

8.4 THE RELATIONSHIP BETWEEN THE FLUE SYSTEM AND THE HOUSE

Because the flue system is the engine that drives the wood heating system, it must have the right
characteristics. The signs of bad system design are cold downdraught when there is no fire in the
wood fire, slow kindling of new fires, and smoke roll-out when the door is open for loading. There
are two guidelines to follow. First, the flue system should be installed up through the heated space
of the house, not out and up an outside wall. Second, the flue system should penetrate to the top
of the building at or near the highest heated space.

8.4.1 WHY INSIDE FLUE SYSTEMS ARE PREFERRED

Flue systems that rise straight up from the wood fire flue collar provide the best performance. Flue
systems that rise inside the warm space of the house tend to provide a small amount of draft even
when there is no fire burning. This means that when you light a fire, the initial smoke goes up the
OPERATING & INSTALLATION INSTRUCTIONS FOR ECOMAXX HT2000 WOOD HEATER
Flue heights and lengths from AS/NZS 2918:2001
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