BENSON JETSTREME 4+ - Air Supply

Air Supply
Conventional Flue
For a conventional flue boiler, air is required, not only for combustion,
but also for ventilation,
and where the boiler is located in a compartment
or cupboard additional ventilation is required.
The
volume of air required is 550mm
2
jkW of boiler output. The requirements for the Jetstreme 4+
range of boilers are given below.
information supplied by: A
OPEN FLUE OPEN FLUE
BOILER IN ROOM
BOILER COMPARTMENT
VENTILATED FROM OUTSIDE
OPEN FLUE
BOILER COMPARTMENT
VENTILATED FROM ROOM
Fig. 4
Model 40/52
~
70/90 95/120
125/140
Boiler in a ventilation In 83.6cm
2
112.8cm
2
I 45.2cm
2
I 93.6cm
2
226.6cm
2
room Out
Nil Nil Nil Nil Nil
Boiler in a
compartment
ventilation In
Out
16.72cm
2
83.6cm
2
225.6cm2
112.8cm
2
290 Acm
2
I 45.2cm
2
387.2cm
2
I 93.6cm
2
453.2cm
2
226.6cm
2
Boiler in a vent to In
83.6cm
2
112.8cm
2
I 45.2cm
2
I 93.6cm
2
226.6cm
2
compartment room Out Nil Nil Nil Nil
Nil
in a room vent to In 250.8cm
2
338Acm
2
435.6cm2 580.8cm2
679.8cm2
compo
Out
I 67.2cm2
225.6cm
2
290Acm
2
387.2cm
2
453.2cm
2
Table 6
Extraction Fan- Conventional Flued Boiler only.
If an extraction fan is fitted either into the room
or an adjacent room, to where the boiler is fitted, it MUST NOT have any effect on the flue pull of
the boiler.
If the extractor fan DOES have a detrimental effect on the boiler, then extra ventilation
must be introduced into the boiler room or to the room adjacent to where the boiler is installed.
9