Grant VORTEX Pro Combi Series User Manual

9 Flue System and Air Supply
32
Flue System and
Air Supply
For a boiler fitted in a compartment,
which is ventilated as shown, no
additional allowance is necessary.
Open flue - Extract fans, where needed,
should be in accordance with Section
4.4.7 in BS 5410 Part 1 1997.
All ventilation is given for domestic
applications. For all other cases refer to
BS 5410 Part 2 1978.
Vent Pro Combi 21e Pro Combi 26e Pro Combi 36e
cm
2
in
2
cm
2
in
2
cm
2
in
2
Vent A 116 18 143 22 198 31
Vent B 231 36 286 44 396 61
Vent C 116 18 143 22 198 31
Vent D 231 36 286 44 396 61
Vent E 347 54 429 67 594 92
!
NOTE
In compliance with Approved
Document L1A 2006, the above
ventilation areas are based on the
total appliance output without
deducting the 5 kW allowance for
adventitious ventilation.
!
NOTE
9.1 Air Supply
A sufficient permanent air supply to the
boiler should be provided for the
following reasons:
• For proper combustion of fuel and
effective discharge of combustion
products to the open air.
• For the ventilation of any confined
space in which the boiler is installed
to prevent overheating of the boiler
any equipment in and near the
boiler.
• For the satisfactory operation of any
draught stabiliser that may be fitted.
It should be both the designer's and
installer's concern that the air required
for these functions be introduced so as
to cause as little discomfort as possible
to the building occupants and thus to
offer them the least temptation to
obstruct the ventilators.
Further details may be obtained from
BS 5410:1:1997.
Minimum Size of Air Vents Required
The table below right shows the
minimum size of air vents required as
illustrated in Figure 9-1 and Figure 9-2
above.
Figure 9-1: Air supply for room sealed balanced flue boilers
Room sealed balanced flue
compartment ventilation from room
B
B
A
A
Room sealed balanced flue
compartment ventilation from outside
Conventional open flue
C
Conventional open flue
compartment ventilation from room
C
D
E
Conventional open flue
compartment ventilation from outside
C
D
Room sealed balanced flue
no ventilation required to room
Boiler in
Room
Boiler in
Compartment
Boiler in
Room
Boiler in
Compartment
Figure 9-2: Combustion and ventilation air supply for conventional flue boilers

Grant VORTEX Pro Combi Series Specifications

General

Brand	Grant
Model	VORTEX Pro Combi Series
Category	Boiler
Language	English