Specifications
2.2 Planning ahead
1. Observe proper combustion air requirements.
2. Provide a rm support system for the chimney fan.
3. Determine the type of system involved.
4. Observe proper safety measures are taken to assure safe use of the wood burning appliances.
Combustion air requirements
Provisions for combustion air must be in accordance with applicable local codes.
Adequate fresh air must be provided for combustion; otherwise, improper operation and inadequate
venting of deadly ue gases may result.
Support system Prior to installation of the chimney fan, it must be assured the chimney can safely carry the weight of
the chimney fan.
A steel chimney should be well supported at the roof penetration point. If the chimney extends more
than 20’ above the roof, the chimney and the fan should be secured by wires attached on the chim-
ney and on the roof at 2 to 3 dierent points.
Brick chimneys usually do not need any kind of support to carry the weight of the chimney fan.
System type Fireplaces and wood stoves used in residences normally operate in a relatively stable environment,
where no major pressure uctuations occur. However, speed adjustments and adjustment of air-
intakes are required as the wood burns and new wood is added to the re.
Fireplaces used in restaurants are exposed to major pressure changes. Doors open, doors close,
kitchen exhaust fans pull out air, etc. Spillage can easily occur.
Wood-red pizza ovens and barbecues are normally installed in restaurant kitchens where kitchen ex-
haust fans are operating. Consequently, the operator should pay attention to the fact that even with a
well balanced exhaust system, it will be necessary to adjust the fan speed in order to avoid spillage.
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3100153 RSHT009 - 016 2012-11-15