Compu-aire CELHP Installation, Operation, Maintenance And Parts Manual page 11

ELECTRIC BEAT
Side section view of supply air duct for wall naunted unit showing clearance to conbustible surfaces.
WARNING
clearance must
A be
This is required for the first 3 feet of ducting.
It is important to insure that the
Failure to do this could result in overheating the mnbuntible material and nay result in a fire.