Rinnai New Zealand Limited
RDV3610 Installation Manual: 11658-E
05-10
21
Flue installation - horizontal termination
For horizontal flue terminations with a 90 ° bend. The shaded sections determine the position
of the flue restrictor.
Horizontal runs of flue pipe must be supported to prevent any downward sags. Horizontal pipe
sections should be supported at least every 1.2 m. Wall straps can be used for this purpose.
The horizontal run of flue pipe must have a 20 mm rise for every 1 m of run towards the
termination. Never allow the flue pipe to run downward. A downward slope can trap heat and
become a fire hazard.
Min. 0.6 m
2.4 m
4.2 m
Max. 5.4 m
Min. 0.3 m
Max. 3.5 m
Max. 0.9 m
Restrictor position # 3
Max. Horizontal =(6.03-Ve
rtical)/0.52
Max. Horizontal = Vertical/0.692
Max. 1.2 m
Restrictor position # 4
No restrictor
Example
Vertical flue:
5.0 m (6.03-5.0) ÷ 0.52
Max. horizontal flue:
2.0 m
Example
Vertical flue:
2.0 m (2 ÷ 0.692)
Max. horizontal flue:
2.9 m
