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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 provided in the
horizontal flue kits.
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 | RDV3611 installation guide: 11156-E 05-16
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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