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50mm min. flue
clearance to
combustibles
75mm Hebel
powerpanel 600mm
min. above firebox.
50mm
500mm
Minimum 1200mm - 700DSU
Minimum 1450mm - 1050DSU
*
100mm
200mm
Non-combustible material to cover Hebel
areas if desired.
Framing noggins may be anchored to Hebel
with appropriate fixing screws
Combustible cladding materials joining to
non-com should not be floating. Join in the
middle of studwork outside Hebel enclosure
4. Clearance requirements -
Hebel installation double sided
500mm
clearance to side
wall projection
Ensure lower air intake is
not obstructed
Minimum thickness can include finishing material as long as the total thermal resistivity is not less than 0.65m2.K/W
1050 DSU unit - Hearth
A minimum 610mm deep x 1330mm wide x 100mm thick floor protector (Hebel blocks) should be used under the appliance, a
Minimum 1450mm wide x 500mm deep x 100mm thick floor protector (Hebel blocks) must be used in front of the appliance base on
both sides when installing the appliance (see joint AS/NZS 2918:2018 3.3.2).
The floor protector should extend 500mm in front of each of the appliance openings and be placed centrally in the 1450mm width.
100mm thick floor protector projection can consist of multi-layered non-combustible materials.
700 DSU unit - Hearth
A minimum 610mm deep x 1150mm wide x 100mm thick floor protector (Hebel blocks) should be used under the appliance, a
Minimum 1200mm wide x 500mm deep x 100mm thick floor protector (Hebel blocks) must be used in front of the appliance base on
both sides when installing the appliance (see joint AS/NZS 2918:2018 3.3.2).
The floor protector should extend 500mm in front of each of the appliance openings and be placed centrally in the 1200mm width.
100mm thick floor protector projection can consist of multi-layered non-combustible materials.
The Thermal resistivity of the floor protector is 0.65m².K/W for 100mm thick Hebel Blocks. The Thermal resistivity for 75mm PowerPanel
is 0.59m².K/W
Fig 3.6
