7
there is combustion present.
2. Existing fuel-fired equipment in the house
such as fireplaces or other heating appli-
ances, smell, do not operate properly, suffer
smoke roll-out when opened, or back-draft
whether or not there is combustion present.
3. Opening a window slightly on a calm
(windless) day alleviates any of the above
symptoms.
4. The house is equipped with a well-sealed
vapour barrier and tight fitting windows
and/or has any powered devices that
exhaust house air.
5. There is excessive condensation on win-
dows in the winter.
6. A ventilation system is installed in the house.
If these or other indications suggest that ventilation
air is inadequate, additional combustion air should
be provided from the outdoors. Outside combustion
air can be provided to the appliance by the following
means:
1. Indirect method: for an appliance not
certified for direct connection of outside
combustion air, the outside air is ducted to a
point no closer than (12”) 300mm from the
appliance, to void affecting the performance
of the appliance.
2. A mechanical ventilation system: if the
house has a ventilation system (air change
or heat recovery):
a. The ventilation system may be able
to provide sufficient combustion make-up
air for the solid-fuel-fired appliance.
b. The householder should be informed that
the ventilation system might need to be
re-balanced by a ventilation technician
after installation of the appliance.
SMOKE SPILLAGE TEST
In all installations a spillage test should be carried
out to ensure there is sufficient combustion and the
flue system is adequate.
The spillage test is carried out as follows:
1. Light/burn appliance under normal condi-
tions in accordance with this installation
manual.
2. Close all doors and windows.
3. Operate all appliances requiring air at full
rate (eg. extraction hoods, tumble dryers
etc).
4. Check for smoke spillage.
CLEARANCES TO COMBUSTIBLES
Maintain at least the following clearances to all
combustible material:
Front 1220mm (36”)
Back 400mm (16”)
Oven Side 150mm (6”)
Oven Side with
Optional Shelf Fitted 250mm (10”)
Firebox Side 300mm (12”)
The minimum clearance to non-combustible materi-
als should be maintained at least 50mm (2”) from the
back of the range.
Never obstruct free air circulation from around or
entering the cooker grills.
Where the flue passes through a combustible mate-
rial a twin wall solid packed insulated chimney con-
nector must be used and come flush with the outer
surface material and run all the way to the masonry
chimney or to the point of termination of the factory
made chimney. (see Fig. 10).
Fig.10
VENTILATION & COMBUSTION AIR
REQUIREMENTS
Provision for outside combustion air may be neces-
sary to ensure that fuel-burning appliances do not
discharge products of combustion into the house.
Guidelines to determine the need for additional com-
bustion air may not be adequate for every situation.
If in doubt, it is advisable to provide additional air.
Outside combustion air may be required if:
1. The solid-fuel-fired appliance does not draw
steadily, smoke rollout occurs, fuels burns
poorly, or back drafts occur whether or not
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