Navien NCB700-2S Plus 42K Installation & Operation Manual page 49

Condensing combi boiler
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Plume Management
The appliance produces a plume of condensate, which can be seen in colder weather. This plume of condensation is harmless, but can be
unattractive, particularly in the case of outlets on outside walls.
For wall terminals a plume management kit is available as an option.
300
1
200
2
Terminal position Plume Management Kit (mm)
1
Clearance no less than 200 mm from the lowest point of the balcony or overhang.
2
1200 mm from an opening in a car port on the same wall i.e. door or window leading into dwelling.
3
The flue cannot be lower than 1000 mm from the top of the light well due to the build up of combustion products.
4
1200 mm between air intake and facing terminal.
Internal/external corners. The air intake clearance can be reduced to 150 mm providing the flue exhaust outlet has a 300 mm
5
clearance.
600 mm distance to a boundary or surface facing a boundary, unless it will cause a nuisance.
6
BS 5440: Part 1 recommends that care is taken when siting terminals in relation to boundaries.
3
1000
1200
4
300
300
window
door
150
150
150
300
5
balcony
200
150
150
200
300
window
window
150
200
150
100
200
25
25
600
6
Flue System
49

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