Reducing Wall And Ceiling Clearances Safely - Enerzone EB00032 Installation And Operation Manual

7.4 REDUCING WALL AND CEILING CLEARANCES SAFELY

You may decrease the minimum
clearances to heat-sensitive materials
by installing heat radiation shields
between the walls or the ceiling and
the wood fire. These heat radiation
shields must be installed permanently,
and must be made of a heat-resistant
or heat-tolerant material.
An air gap must separate the heat
shield from any heat-sensitive surface.
Furthermore, the heat shield shall
extend in all directions beyond the
boundaries of the appliance surface by
a distance of not less than 450 mm.
Exceptions may apply. Refer to AS/NZS
2918:2001.
Following the installation of such heat radiation shields, the minimum clearances to heat-sensitive
materials may be reduced by applying the clearances factor in the table below:
CONSTRUCTIONS AND CLEARANCES FACTORS FOR APPLIANCES HEAT SHIELDS
HEAT SHIELD CONSTRUCTIONS
Single layer of continuous material
Single layer of continuous material
Two spaced layers of continuous material
NOTES:
1- Masonry may be used as a heat shield material.
2- Where heat shields are used to reduce appliance clearance dimensions, additional flue
shielding may also be required. Refer to AS/NZS 2918:2001.
3- Non standard installations – Refer to AS/NZS 2918:2001 for guidance.
32
WHICH ARE WITHIN 45
o
OF THE VERTICAL
Minimum air gap
dimensions (mm)
12
25
12+12
Solution 3.4 Installation and Operation Manual
Clearances factor
0.40
0.30
0.20