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Manual 2100-193O
Page 11 of 26
Side section view of supply air duct for wall mounted unit showing 1/4" clearance to combustible surfaces.
FIGURE 4
ELECTRIC HEAT CLEARANCE
WARNING
A minimum of 1/4" clearance must be maintained between the
supply air duct and combustible materials. This is required for
the fist three (3) feet of ducting.
It is important to insure that the 1/4" minimum spacing is
maintained at all points.
Failure to do this could result in overheating the combustible
material and may result in a fire.