Grant 50/70 - Air Supply

16
Grant Vortex Indoor/Utility, System and Boiler House Oil Boilers
BOILER IN
ROOM
Conventional open flue
C
BOILER IN
COMPARTMENT
Conventional open flue
compartment ventilated from room
Conventional open flue
compartment ventilated from outside
C
C
D
D
E
BOILER IN
ROOM
Room sealed balanced flue
no ventilation required to room
BOILER IN
COMPARTMENT
Room sealed balanced flue
compartment ventilated from room
Room sealed balanced flue
compartment ventilated from outside
B
B
A
A
Fig. 8 - Air supply for room sealed balanced flue boilers
4 - GENERAL BOILER INFORMATION
Fig. 9 - Air supply for conventional flue boilers
155/200
319 cm² (50 in²)
638 cm² (100 in²)
200/240
385 cm² (60 in²)
770 cm² (120 in²)
Model
Vent A
Vent B
50/70
116 cm² (18 in²)
232 cm² (36 in²)
90/120
198 cm² (31 in²)
396 cm² (62 in²)
Model
Vent A
Vent B
120/155
253 cm² (40 in²)
506 cm² (80 in²)
155/200
319 cm² (50 in²)
638 cm² (100 in²)
957 cm² (150 in²)
200/240
385 cm² (60 in²)
770 cm² (120 in²)
1155 cm² (180 in²)
Model
Vent C
Vent D
Vent E
50/70
116 cm² (18 in²)
232 cm² (36 in²)
348 cm² (54 in²)
90/120
198 cm² (31 in²)
396 cm² (62 in²)
594 cm² (93 in²)
Model
Vent C
Vent D
Vent E
120/155
253 cm² (40 in²)
506 cm² (80 in²)
759 cm² (120 in²)
Air supply
4.6
See Figs. 8 and 9
A sufficient permanent air supply to the boiler should
be provided:
a For proper combustion of fuel and effective
discharge of combustion products to the open air.
b 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.
50/90
143 cm² (23 in²)
286 cm² (46 in²)
429 cm² (69 in²)
50/90
143 cm² (23 in²)
286 cm² (46 in²)