Century Heating CB00018, Инструкция по установке и эксплуатации

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Century FW2600 Installation and Operation Manual
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8.4.2 Why the chimney should penetrate the highest heated space
When it is cold outside, the warm air in the house is buoyant so it tends to rise. This
tendency of warm air to rise creates a slight pressure difference in the house. Called ‘stack
effect’, it produces a slightly negative pressure low in the house (relative to outside) and a
slightly positive pressure zone high in the house. If there is no fire burning in a heater
connected to a chimney that is shorter than the warm space inside the house, the slight
negative pressure low in the house will compete against the desired upward flow in the
chimney.
There are two reasons why the
chimney in the house at right will
cold backdraft when it is cold
outside and there is no fire
burning in the stove. First, the
chimney runs up the outside of
the house, so the air in it is colder
and denser than the warm air in
the house. And second, the
chimney is shorter than the
heated space of the house,
meaning the negative pressure
low in the house will pull outside
air down the chimney, through the
stove and into the room. Even the
finest stove will not work well
when connected to this chimney.
8.5 Supply of Combustion Air
In Canada, wood stoves are not required to have a supply of combustion air from outdoors
(except in mobile homes) 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 in
which the stove is installed. The CO detector will provide warning if for any reason the
wood stove fails to function correctly.
8.5.1 Combustion Air Supply in Mobile Homes
Only a wood stove certified and labelled as ‘mobile home approved’ may be
installed in a mobile home. This (Century FW2600) stove is ‘mobile home approved’.
Wood stoves installed in mobile homes must have a ducted supply of combustion air from
outdoors. This air supply should be routed down through the house floor into the vented
crawl space under the mobile home. The air supply duct should be non-combustible
aluminum flex duct with a screened weatherhood on the outside end.
Note: Fabric duct may also be used, provided it is suitable for HVAC use and meets the
requirements of ULC-S110 or UL-181 Class 1 standards. It must have a non-combustible
insulation and be corrosion resistant.