An enhanced convection heat-treatment system and method is configured to direct airflow with a plurality of air-paths past product, such as loaves of bread, to impart heat to the product and past a heating system to impart heat to the air. Other components are cooled by the air as it passes from the high thermal loading component to exit from the unit. The frame assembly has at least one elongate arm configured to receive a bicycle cradle thereupon. In the present invention, the start and end of the on time respectively have a gradually-ascending interval and a gradually-descending interval, andor the start and end of the standby time respectively have a gradually-descending interval and a gradually-ascending interval. The fair share may be computed by dividing the total time that all competing flows use the RF channel by the number of competing flows.