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General flueing guidelines
Every gas fire requires a flue system that will draw effectively and clear flue products safely under all
potential wind and climatic conditions. It is the responsibility of the installer to ensure that the appliance
is provided with an effective flue.
Some guidelines to assist with flue design are detailed below. These must be read and modified as
necessary depending on the installation. The Symmetry RDV3611 must be installed with an approved
flue system, approved components are shown in this guide.
Flue clearance to combustibles
The Rinnai Symmetry RDV3611 flue is made
up of an inner flue with a protective outer flue
(heat shield). It is the inner flue that gets hot,
requiring clearance to a combustible surface.
AS/NZS 5601.1 6.8.12 (c) states there must
be an air space around the flue of at least 25
mm. As the Ø 170 mm outer flue maintains a
70 mm air space around the hot section of the
inner flue, protection of a combustible surface
is automatically maintained.
The only additional clearance required is
10 mm from the outer flue to a combustible
surface to allow for expansion and contraction
of the outer flue component.
Flashings
Flashings are not included with the Symmetry
flue kits, these must be specified. The only
exception is the flashing kit (R3646) provided in
the horizontal flue kits, refer note on next page.
Flue cowl clearance
To ensure products of combustion are cleared
adequate clearance from the building is
required.
The flue cowl should have a 500 mm clearance
from any part of the building. This also applies
to steeped and pitched roofs where the flue
cowl should be 500 mm clear of the ridge line.
Adequate fresh air flow must exist around the
flue cowl following installation.
Minimum clearances are shown in
AS/NZS 5601.1.
22 | Symmetry RDV3611 installation guide 11156-H 08-21
10 mm
Combustible surface
Flue clearance to a combustible surface
Minimum clearance 500 mm to the nearest part of
the roof
70 mm air space
Ø 170 mm outer flue
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