Hallman HRG4801U User Manual page 15

The appliance shall not be used for space heating. This information is based
on safety considerations. All openings in the wall behind the appliance and
in the floor under the appliance shall be sealed.
Dimensions and Clearances
The range may be installed flush to the rear wall. You may install a non-combustible
material on the rear wall above the range and up the vent hood. It is not necessary to
install non-combustible materials behind the range below the counter top height.
The minimum distance from the side of the range above the counter top to
combustible sidewalls must be at least 10 inches.
Installation Introduction
11