38
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:
Model
Gross
Input
(kW)
Net
Input
(kW)
Ventilation
(Room)
(cm
2
)
Compartment
Compartment
(Direct to Outside)
(To Internal Space)
High
(cm
2
)
Low
(cm
2
)
High
(cm
2
)
Low
(cm
2
)
EKW46CE
43.9
39.6
165
200
400
400
800
EKW61CE
58.6
52.8
230
265
530
530
1060
11.1.1
COMBUSTION
VENTILATION
REQUIREMENTS
EKW46CE
–
EKW61CE
Model
Input
(Gross)
kW
Input
(Net)
kW
Plant Room
Enclosure
Low
Summer Use
Medium
Summer Use
High
Summer Use
Low
Summer Use
Medium
Summer Use
High
Summer Use
High
(cm
2
)
Low
(cm
2
)
High
(cm
2
)
Low
(cm
2
)
High
(cm
2
)
Low
(cm
2
)
High
(cm
2
)
Low
(cm
2
)
High
(cm
2
)
Low
(cm
2
)
High
(cm
2
)
Low
(cm
2
)
EKW86CE
83.5
75.3
152
304
228
380
304
456
380
760
456
836
532
912
11.1.2
COMBUSTION
VENTILATION
REQUIREMENTS
EKW86CE
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:
Model
Input
(Gross)
kW
Input
(Net)
kW
Enclosure/Compartment
Enclosure/Compartment
Water heater Room
(Direct to Outside)
(To Internal Space)
High
(cm
2
)
Low
(cm
2
)
High
(cm
2
)
Low
(cm
2
)
High
(cm
2
)
Low
(cm
2
)
EKW46CE
43.9
39.6
200
200
400
400
N/A
N/A
EKW61CE
58.6
52.8
265
265
530
530
N/A
N/A
EKW86CE
83.5
75.3
380
380
760
760
152
152
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.
Summary of Contents for ECOKNIGHT EKW116CE
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