No part of a building, or any adjacent object, may be above the flue in a circular area of 3
metres from the flue exit.
These heights are given as a minimum, and in actual practice the presence of surrounding
structures, trees, fences, etc. may necessitate additional flue height for satisfactory
performance.
5
INSERT FLUE INSTALLATION
Determine whether the flue pipe will fit vertically in the chimney from the heater to the cowl. An
adjustable bend may be required to offset the flue from the heater in order to clear part of the
chimney structure. If an offset is required, it should be fitted to the flue outlet on the heater, so
that the flue pipe itself is vertical. The flue pipe should not touch the masonry.
Check chimney for accepting flue is in sound condition, and fixing of outer casing or chimney
cap flashing to chimney crest is achievable.
3m
3m
3m
More than 3m
0.6m
1m min
or less
Increase as
necessary
until nothing
is within 3m of
top of flue
FIG. 2
Increase from
1m until clear
within 3m of
top of flue
additional 200mm sections of flue as necessary to ensure minimum 1m flue height above roof is
achieved (Refer Fig.2 for more detail). Ensure the 150mm flue pipe extends at least 180mm above
the 200mm flue casing at the top. Trim flues if required.
Join together as many 250mm outer flue casings as manageable with swaged ends up, fix
lengths together with 3 rivets or self-tapping screws and slide over 200mm flue casing pipe from
the top down to sit in position onto the 250mm section of flue transition atop the Zero clearance
box. Add additional 250mm sections of flue as necessary to finish at the same height as the
200mm flue liner. Trim last section if necessary.
Fit a suitable flashing over the flue and roof penetration hole to flash the outer casing to the
roof, seal and fix flashing to roof and outer liner casing with an appropriate waterproof seal.
Place top spreader bracket in place and tighten, slide the cowl transition over the 150mm flue
pipe until it rests on the top spreader, fit the Rain-Hat cowl. Note; Rain-Hat must be removable for
cleaning. In high wind zones secure in place with a self tapper screw.
Where a flue terminates more than one full flue section above the roof penetration, it must be
restrained with guy wires or support bracing bars for stability in high wind conditions.
The flue system should be vertical and without bends. If an offset is required, it should be as close
to the wood fire as practicable and should not be offset more than 500mm from the centre line
of the flue stub. Clearances from the flue pipe to combustible materials must be maintained.
Restrictions or leaks in the flue system may reduce the draught, and, in severe conditions, could
cause smoke to enter the room.
NOTE: The flue pipe shall extend not less than 4.6m above the top of the floor protector.
The flue cowl must be at least 0.6m above the highest point of the roof, if within 3 metres of the
ridge. The flue cowl must be at least 1m above the roof penetration if more than 3 metres from
the ridge (Refer Fig. 2).
Содержание Logfire II
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