Air Supply; Combustion Ventilation; Cooling Ventilation - Lochinvar EcoShield SHW35-245CE Installation, Commissioning & Maintenance Instructions

11.0 AIR SUPPLY

The following information is based on single water heater installations only. If more than one water heater is being used, BS6644 should be
consulted to calculate the necessary requirements.
11.1

COMBUSTION VENTILATION

When used as a Type C 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 appliance, the combustion air requirements are as follows:
Model
SHW35-245CE
SHW46-325CE
SHW61-325CE
COMBUSTION VENTILATION REQUIREMENTS SHW35-245CE – SHW61-325CE
Gross
Model Input
(kW)
SHW86-410CE 83.5
SHW116-410CE 117.2
SHW146-410CE 146.5
COMBUSTION VENTILATION REQUIREMENTS SHW86-410CE – SHW146-410CE
11.2

COOLING VENTILATION

When used as a type C appliance, cooling ventilation should be provided as follows:
Input
Model (Gross)
kW
SHW35-245CE 36.6
SHW46-325CE 43.9
SHW61-325CE 58.6
SHW86-410CE 83.5
SHW116-410CE 117.2
SHW146-410CE 146.5
COOLING VENTILATION REQUIREMENTS
When used as a type B appliance, provision for cooling ventilation is included in the combustion ventilation allowance.
Gross Net
Input Input
(kW) (kW)
36.6 33.3
43.9 39.6
58.6 52.8
Net
Low
Input
Summer Use
(kW)
High Low High
(cm ) (cm ) (cm
2 2
75.3 152 304 228
105.6 212 424 318
132.0 264 528 396
Enclosure/Compartment
Input
(Direct to Outside)
(Net)
kW
High
(cm
33.2 166
39.6 200
52.8 265
75.3 380
105.6 530
132.0 660
Ventilation
(Direct to Outside)
(Room)
(cm ) High
2
(cm )
2
132 166
165 200
230 265
Plant Room
Medium High
Summer Use Summer Use
Low High Low
) (cm ) (cm ) (cm
2 2 2
380 304 456
530 424 636
660 528 792
Low
) (cm )
2 2
166
200
265
380
530
660
Compartment
Low
(cm )
2
332
400
530
Enclosure
Low Medium
Summer Use Summer Use
High Low High
) (cm ) (cm ) (cm
2 2 2 2
380 760 456
530 1060 636
660 1320 792
Enclosure/Compartment
(To Internal Space)
High Low
(cm ) (cm )
2 2
332 332
400 400
530 530
760 760
1060 1060
1320 1320
Compartment
(To Internal Space)
High Low
(cm ) (cm )
2 2
332 664
400 800
530 1060
High
Summer Use
Low High Low
) (cm ) (cm ) (cm )
2 2 2
836 532 912
1166 742 1272
1452 924 1584
Internal Space/Boiler Room
High Low
(cm ) (cm )
2 2
N/A N/A
N/A N/A
N/A N/A
152 152
212 212
264 264
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