Navien NCB300-28K Installation & Operation Manual page 37

Condensing combi boiler
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A terminal must not be sited under a car port roof.
Note
In certain weather conditions the terminal will emit a plume of steam. If possible avoid positioning the terminal where this
may cause a nuisance, i.e. positions A, D, G, H, J or M.
The flue terminal must be exposed to the external air and the position must allow the free passage of air across it at all times.
A terminal must not be sited below 2 m where people have access to, such as public footpaths, access routes, patios etc.
However, If the terminal is fitted less than 2 m above a surface where there is no public access, the terminal must be protected
by a terminal guard.
Proximity of Flue Duct Outlet to a Boundary
3
a) Facing the boundary
3
c) At an angle to the boundary
#
Description
1
Boundary
2
Terminal
3
Building
4
Adjacent building
5
Window
36
Flue System
2
3
1
4
2
3
b) Parallel to the boundary
5
d) Opening in adjacent building
2
1
2

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