2.2
Positioning the Heater
First review the necessary clearances specified below before
considering where to position the heater along with the
appliance dimensions in Section “8. Technical Drawings”.
Also check the practicability of installing the flue system in
relation to any obstructing roof beams before positioning the
heater.
These clearance distances can only be reduced if the
surrounding walls are made of non-combustible material, eg.
stone, brick, or concrete. If non-combustible material,
distance can be reduced to 100 mm. Alternatively, shielding
of the wall(s) can reduce clearances (refer to next section for
more detail).
Depending on the type of flue shielding used, the clearances
to combustible surfaces varies.
2.2.1 Standard Installation:
Flue shielding
A (mm)
B (mm)
C (mm)
900mm rear flue shield
750
(*450)
175
(*125)
300
Decro-mesh with
900mm inner reflector
750
(*450)
175
300
(Note:
*
when fitted with side shields)
2.2.2 Corner Installation:
Flue shielding
C (mm)
D (mm)
900mm rear flue shield
300
750
(*225)
Decro-mesh with
900mm inner reflector
300
750
(*225)
(Note:
*
when fitted with side shields)
2.3
Floor Protector (Hearth)
Unless the heater will be standing on a heat resistant floor
such as concrete slab with slate or tiles, it will be necessary to
provide a floor protector (hearth).
The dimensions given in above (Section 2.2) are the minimum
required for the floor protector. It must extend no less than
300 mm in front of the door opening, no less than 275mm
either side of the door opening, and extend under the heater.
Minimum dimensions for floor protector are 900mm wide by
900mm deep. It may be desirable, for example aesthetic
reasons, for the floor protector to be larger than these
minimum dimensions.
The floor protector shall be constructed of non-combustible
material no less than 15mm thick and with a thermal
conductivity not greater than 0.33W/m
º
K, eg. compressed
cement sheet. The floor protector may be laid directly on the
combustible floor.
For more details and variations on floor protectors refer to
AS/NZS 2918:2001 Clause 2.2, 3.3.1, & 3.3.2.
