Table of Contents
Advertisement
11.0 AIR SUPPLY
The following information is based on single water heater installations only. If more than one water heater is being
used, BS5440-2 or BS6644 (as appropriate) should be consulted to calculate the necessary requirements.
11.1
COMBUSTION VENTILATION
When used as a Type C (room sealed) appliance, provided sufficient clearance is provided, ventilation for combustion
is not necessary as the combustion air is ducted directly from outside.
When used as a Type B (open flue) appliance, the combustion air requirements are as follows:
Gross
Input
Model
(kW)
EKW46CE
43.9
EKW61CE
58.6
11.1.1
COMBUSTION VENTILATION REQUIREMENTS EKW46CE – EKW61CE
Input
Input
Model
(Gross)
(Net)
kW
kW
EKW86CE
83.5
75.3
EKW116CE
117.2
105.6
EKW146CE
146.5
132.0
EKW176CE
175.8
158.4
EKW206CE
205.2
184.5
EKW236CE
234.5
211.3
11.1.2
COMBUSTION VENTILATION REQUIREMENTS EKW86CE – EKW236CE
11.2
COOLING VENTILATION
When used as a type C (room sealed) appliance, installed in a compartment or an enclosure, as shown in Figure
5.2.1, cooling ventilation should be provided as follows:
Input
Model
(Gross)
kW
EKW46CE
43.9
EKW61CE
58.6
EKW86CE
83.5
EKW116CE
117.2
EKW146CE
146.5
EKW176CE
175.8
EKW206CE
205.2
EKW236CE
234.5
11.2.1
COOLING VENTILATION REQUIREMENTS
When used as a type B (open flue) appliance, provision for cooling ventilation is included in the combustion ventilation
allowance.
Net
Ventilation
Input
(Room)
(kW)
(cm
)
2
39.6
165
52.8
230
Plant Room
Low
Medium
Summer Use
Summer Use
High
Low
High
Low
(cm
)
(cm
)
(cm
)
(cm
)
2
2
2
2
152
304
228
380
212
424
318
530
264
528
396
660
318
636
477
795
370
740
555
925
424
848
636
1060
Enclosure/Compartment
Input
(Direct to Outside)
(Net)
kW
High
Low
(cm
)
(cm
2
39.6
200
52.8
265
75.3
380
105.6
530
132.0
660
158.4
795
184.5
925
211.3
1060
1060
Compartment
(Direct to Outside)
High
Low
(cm
)
(cm
)
2
2
200
400
265
530
High
Low
Summer Use
Summer Use
High
Low
High
Low
(cm
)
(cm
)
(cm
)
(cm
2
2
2
304
456
380
760
424
636
530
1060
528
792
660
1320
636
954
795
1590
740
1110
925
1850
848
1272
1060
2120
Enclosure/Compartment
(To Internal Space)
High
Low
)
(cm
)
(cm
2
2
200
400
400
265
530
530
380
760
760
530
1060
1060
660
1320
1320
795
1590
1590
925
1850
1850
2120
2120
Compartment
(To Internal Space)
High
Low
(cm
)
(cm
)
2
2
400
800
530
1060
Enclosure
Medium
High
Summer Use
Summer Use
High
Low
High
Low
)
(cm
)
(cm
)
(cm
)
(cm
2
2
2
2
456
836
532
636
1166
742
1272
792
1452
924
1584
954
1749
1113
1908
1110
2035
1295
2220
1272
2332
1484
2544
Water heater Room
High
Low
)
(cm
)
(cm
2
2
2
N/A
N/A
N/A
N/A
152
152
212
212
264
264
318
318
370
370
424
424
)
2
912
)
40
Advertisement
Table of Contents
