Series HAB
Page 10
LT169 Aug 10, 2021
Installation Instructions
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Clearance to Combustibles
A general clearance of 18” (0.5 m) in every direction
is recommended for servicing only around
each Burner, also to ensure adequate air flow in and around the Heating System.
The stated clearance to combustibles represents a surface temperature of 90°F (50°C) above room
temperature. Building materials with low heat tolerance
(such as plastics, vinyl siding, canvas, tri-
ply, etc…)
maybe subject to degradation at lower temperatures.
It is the installer’s responsibility
to assure that adjacent materials are protected from degradation.
In addition to this it is very important to observe the minimum clearance to combustibles at all
times to avoid any possibility of property damage or personal injury.
Table below lists the minimum clearance to combustible materials for various installation
configurations. Additional clearance may be required for glass, painted surfaces and other materials
which maybe damaged by radiant or convective heat.
Combustible materials are considered to be wood, compressed paper, plant fibres, plastics, Plexiglas
or other materials capable of being ignited and burned. Such materials shall be considered
combustible even though flame-proofed, fire-retardant treated or plastered.
Note with an ambient temperature of 70
°
F the surface temperatures at the clearance distances
listed below could reach 160°F, Care should be taken with placement of plastic or vinyl in the
proximity of the heater as they tend to distort and soften at these temperatures.
Adequate clearance to sprinkler heads must be maintained.
NOTE
: Sprinkler head heat fuse link performance may alter with age.
NOTE
:
Some materials deteriorate or soften at sustained temperatures below 160°F.
Consult material manufacturer for recommendations
