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9 AIR SUPPLY FOR COMBUSTION & VENTILATION
(see BS5410)
9.1 Open Flue Boilers
When the boiler is sited in a cellar where the only access for combustion and
ventilation air is at high level then the combustion air should be ducted to low
level.
Combustion Air Supply
Boiler in Room
OPEN FLUE
Boiler in Compartment
OPEN FLUE
VENTILATED FROM OUTSIDE
OPEN FLUE
VENTILATED FROM ROOM
9.2 Balanced Flue Boilers – Boilers in a Compartment
VENTILATED FROM OUTSIDE VENTILATED FROM ROOM
Air Supply for Ventilation
No Combustion Air Inlet Required to Room
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