A heating assembly can include a housing with a gas hook-up and an integrated nozzle structure. The nozzle structure can include a first nozzle and a second nozzle. The first nozzle and second nozzle can be concentrically positioned relative to each other. The first nozzle and second nozzle can be adjacent each other. The housing can also include a valve that has a first position in which flow is permitted through the first nozzle but not the second nozzle. The valve can have a second position in which flow is permitted through the first nozzle and the second nozzle.