Stratford
Fireplace Installation and Operation Manual
__________________________________________________________________________ 59
Follow these steps:
1.
Position the fireplace in its location. Temporarily install
the elbow or chimney section (A) on the top of the
fireplace and, using a level, mark with an oval the location
where the flue liner will enter the masonry chimney.
2.
In the middle of the oval, drill a hole in the masonry
chimney at 45
°
or 30
°
.
3.
Increase the size of the hole until a 45
°
or 30
°
insulated
liner adapter (B) can be easily slipped through.
4.
Slide the liner (C) down from the top of the masonry
chimney until you reach the hole level.
5.
Slip through the hole a 45
°
or 30
°
insulated liner adapter
and connect it to the liner.
6.
Seal the opening around the liner with high temperature
refractory cement.
7.
Then, follow the chimney manufacturer’s instructions to
connect the extended liner section to the special chimney
connector.
Note:
Make sure the liner exceeds at least 12” (30 cm) the
top of masonry chimney.
8.10
SUPPLY OF COMBUSTION AIR
In Canada, wood fireplaces are not required to have a supply of combustion air from outdoors because
research has shown that these supplies do not give protection against house depressurization and may fail
to supply combustion air during windy weather. However, to protect against the risk of smoke spillage due
to house depressurization,
a carbon monoxide (CO) detector/alarm is required
in the room where the
fireplace is installed. The CO detector will provide warning if for any reason the wood fireplace fails to
function correctly.
8.10.1
AIR SUPPLY IN CONVENTIONAL HOUSES
The safest and most reliable supply of combustion air for your wood fireplace is from the room in which it
is installed. Room air is already preheated so it will not chill the fire, and its availability is not affected by
wind pressures on the house. Contrary to commonly expressed concerns, almost all tightly-sealed new
houses have enough natural leakage to provide the small amount of air needed by the fireplace. The only
case in which the wood fireplace may not have adequate access to combustion air is if the operation of a
powerful exhaust device (such as a kitchen range exhaust) causes the pressure in the house to become
negative relative to outdoors.
If you do install an air supply through the wall of the house, be aware that its pressure can be affected
during windy weather. If you notice changes in wood fireplace performance in windy weather, and in
particular if smoke puffs from the fireplace, you should disconnect the outdoor air duct from the fireplace
and remove the duct. In some windy conditions, negative pressure at the duct weatherhood outside the
house wall may draw hot exhaust gases from the fireplace backwards through the duct to outdoors. Check
the outdoor air duct for soot deposits when the full system is cleaned and inspected at least once each
year.
