Rinnai RHFE-1004FA - Manual (Page 20)

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SNOW AREAS
In areas subject to heavy snowfall, keep snow clear
of flue terminal at all times.
STANDARD INSTALLATION OF FLUE MANIFOLD.
Diagram below shows minimum clearances and
distances from obstructions.
Also check local regulations.
Side Clearances
Snow
Flammable
Wall
Non
Flammable
(600mm)24"
10"(250mm)
Opposite
Wall
Floor
24"
(600mm)
20"(500mm)
Obstruction
20"
(500mm)
Clearance in accordance with local installation
codes and the requirements of the gas supplier.