This heater does not require a 120V A.C. supply for operation but it is highly recommended to install the supplied AC adaptor to eliminate the need for
batteries. In case of a power failure, the burner switch and the optional remote control will continue to operate if batteries are installed in the receiver. However,
a 120V A.C. power supply is needed for the fan/blower operation.
(Do not cut the ground terminal off under any circumstances.)
NOTE: Even if the fan is not purchased with the unit,we highly recommended bringing power to the receptacle box (provided with
the unit) in case the fan is installed at a later date. The AC adaptor is included with this appliance.