BIO Pellet Stoves
6
These positions are de
fi
ned by Document J of the Building Regulations.
Seek specialist advice if installing
in a dwelling with a thatched roof
Adjacent
Building
Terminal
Flue
Horizontal
Measurement
A
D
150mm
Max
B
Vertical
Measurement
C
Adjacent
Building
Insulation
The datum for vertical measurement is the point of
discharge of the
fl
ue from either the point of disxcharge
ofn the
fl
ue or 150mm above insulation, whichever is
the lower.
If the chimney is believed to have previously served an open fire it must be swept a second time
within a month of regular use after installation to clear any soot falls that may have occurred due to
difference in combustion levels. The flue exit from the building must comply with local building control
rules. Do not connect or share the flue or chimney system with another heating appliance. Do not
connect to systems containing large voids or spaces over 230mm square.
Chimney
Suitable access must be provided to enable the collection and removal of debris. The flue must be
swept and inspected when the appliance is installed. The flue draught must be checked with all
windows and doors closed and any extraction fans in this, or adjoining rooms, running at maximum
speed (see next section for additional ventilation requirements).
•
Max. draught = 2.0mm Wg,
•
Min. draught = 1.0mm Wg
The draught, which is necessary for the different models of pellets stoves, is 8pa to 12pa (0,08 to
0,12mbar).
Point where the flue passes through weather surface (Note 1 & 2)
Clearances to the flue outlet
A
At or within 600mm of the ridge
At least 600mm above ridge
B
Elsewhere on the roof (whether pitched or flat)
At least 2300mm horizontally from the nearest point on the
weather surface (a) at least 100mm above the highest
point of interaction of the chimney and weather surface; or
(b) at least as high as the ridge
C
Below (on a pitched roof) or within 2300mm horizontally to open-
able rooflight, dormer window, or other opening (Note 3)
At least 1000mm above the top as the ridge
D
Within 2300mm of an adjoining or adjacent building, not beyond the
boundary (Note 3)
At least 600mm above any part of the adjacent of the
building wall
Note:
1.
The weather surface is the building external, such as it’s roof tiles or external walls.
2.
A flat roof has a pitch less the 10º
3.
The clearance given for A or B, as appropriate, will also apply.
4.
A vertical flue fixed to an outside wall should be treated as equivalent to an inside flue emerging at the nearest edge of the roof
Chimney Maintenance
The chimney flue must be kept always clean: deposits of soot or incombustible oils reduce its section in size
obstructing its draught, compromising the good functioning of the stove and if the residuals are big they can
catch fire. The chimney flue and pot must be cleaned and checked by an expert at least once a year. Safety
can be compromised by the non-cleaning.
Summary of Contents for BIO80
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