Brunner IRON DOG 1, Installation Manual

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12 Installation manual (1.4) © 2019 Brunner GmbH
10 COMBUSTION AIR
A heating device may be located only in rooms, where sufficient combustion air supply is guaranteed.
Normal operation requires sufficient air supply using a separate
combustion air connection .
Sufficient combustion air supply is present, when by natural means or using technical equipment a
combustion air volume of 12,5 m
3
per 1 kg fuel throughput can stream into a room with wood-burning
fireplace over a period of 1 hour at calculated negative pressure below 0,04 mbar (4 Pa) against outside air
pressure. This is equivalent to a speculative heating power (PLF) of 8 kW per 1 kg fuel throughput.
Combustion air supply is ensured in rooms with at least one window or one door leading to the exterior that
can be opened, or when these rooms are directly connected or interconnected by air with other rooms of
such type. Rooms considered as directly connected or interconnected by air, can as such be only parts of
one flat or one facility of other kind. Particular attention to combustion air supply is to be paid, when exhaust
fans and other heat generators in the same room combination are operated, or when multiple heating
devices are connected to one single chimney.
Ventilation systems in this room combination cannot create negative pressure, which could affect the
functioning of the fireplace. Exhaust ventilation systems operating in the same room or room combination
together with fireplaces, can cause many problems.
When in the same room or additional rooms in connection other fireplaces are in operation, these fireplaces
require at least 1,6 m
3
of combustion air per hour for each kW of their total rated heat power. When a room
contains only a small volume of air and furthermore, the building is relatively air-tight, a separate combustion
air supply leading to the exterior is required.
Ventilation lines or shafts must be tight and accessible for revision and cleaning. Ventilation air grilles cannot
narrow the free cross section.
Make sure to avoid the risk of water condensation in combustion air pipe when cold air is aspirated from
outside the building!
Remember about noise insulation!
Ventilation lines and their insulation materials must not contain any combustible ingredients (class A1
building materials). For buildings with more than two storeys and when crossing fire protection walls, the
construction of these ventilation lines must prevent fire and smoke from penetrating other fire protection
zones (their components must have a fire resistance rating of >90 minutes (F90)). See also regional building
law.