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9 Exhaust gas connection
9.1 Type A3
A3 / 61
Room air-dependent gas furnaces with fans in
front of burners without flow guards and total
rated load in installation space less than or equal
to 14kW. It is not mandatory that gas only be
supplied to the burners when the exhaust system
is in operation.
Updraft lines are not required.
To install Type A gas units with total rated loads
less than or equal to 14kW, it is sufficient if
> the installation space has a capacity of more
than 2m³/kW, or
> there is a door or window to the outside that
can be opened, or
> the kitchen ventilation system in use has a
minimum extraction volume of 15m³/h per
kW total rated load and corresponding venti-
lation openings.
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