In accordance with one embodiment, an air conditioner unit is provided. The air conditioner unit includes a heater housing having peripheral surfaces defining a housing interior, the peripheral surfaces including a first sidewall and a second sidewall spaced apart along the lateral direction. The air conditioner unit further includes a guide track extending along the lateral direction between the first sidewall and the second sidewall. The air conditioner unit further includes a blower fan, the blower fan including a blade assembly disposed within the interior and a motor connected to the blade assembly. The air conditioner unit further includes a heating unit comprising a first bracket and a second bracket spaced apart along the lateral direction. The heating unit further includes at least one heater bank extending along the lateral direction between the first bracket and the second bracket. The heating unit is movable along the guide track.