Installation guide

10 | Compact 2 Installation Guide: 11817-A 01-12
Flueing guidelines
Clearance to combustibles
Minimum clearance from inner
flue to combustible material must
be greater than 25 mm.
Flashings
To top of chimney structure do not
form part of the flue kit and must
be specified.
Flue cowl clearance
To ensure products of combustion
are cleared, adequate clearance
for 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 which
should be clear of the ridge line
as shown. Lesser clearances
may provide perfectly adequate
flue systems depending on the
installation. Minimum clearances
are shown in AS/NZS 5601.1, or
NZS 5261*.
Flue length and bends
This is required for adequate
draw, and prevents spill-back of
combustion products that can
cause the safety sensors to shut
down the fire.
- Minimum flue length
3.6 m vertical. 1.2 m of
vertical flue is required before
any bend or offset.
- Maximum flue length
Rinnai recommend a
maximum flue height of 8 m.
- Bends
Maximum of 2 x 45 ° bends.
Flue terminal locations
Must be compliant with
‘Clearances Required for Flue
Terminals’ from AS/NZS 5601.1, or
NZS 5261* 2003.
Flue is not to terminate under
floors or in a roof space.
Self-supporting flue
The weight of the flue system
should not be supported by the
appliance—it should be self-
supporting. Supporting the flue
is usually completed during the
framing stage with flue supports
or straps within the cavity.
Shared flues
Gas appliances must not be
connected to a chimney or flue
serving a separate fuel burning
appliance.
* NZS 5261 applicable until December
31st, 2012.
Combustible Material
(must be greater than 25 mm from inner flue)
Flue
Inner flue
Outer flue
Clearance to combustibles
Self-supporting flue
Flue cowl clearance—500 mm clearance from any part of the building