An outlet assembly, comprising: a housing defining an internal cavity; a first orifice of a first size that is disposed proximate an upstream end of a main pathway that extends longitudinally through the internal cavity; a second orifice of a second size that is larger than the first size disposed proximate a downstream end of the main pathway; one or more first auxiliary pathways that are disposed between the first orifice and the second orifice and that intersect the main pathway; an internal mechanism that automatically moves the first orifice between a first position and a second position wherein: when the first orifice is in the first position, a flow of gas flowing through the outlet assembly flows into the main pathway via the first orifice so that the flow of gas flows through the second orifice at a first flow rate regulated by the first orifice; and when the first orifice is in the second position, the flow of gas primarily bypasses the first orifice and flows into the main pathway via the one or more first auxiliary pathways so that the flow of gas flows through the second orifice at a second flow rate regulated by the first orifice and the one or more first auxiliary pathways, characterized in that the outlet assembly further comprises one or more second auxiliary pathways that are disposed between the first orifice and the second orifice and that intersect the main pathway; wherein the internal mechanism automatically moves the first orifice between the first position, the second position, and a third position; and wherein, when the first orifice is in the third position, the flow of gas primarily bypasses the first orifice and flows into the main pathway via the one or more first auxiliary pathways and the one or more second auxiliary pathways so that the flow of gas flows through the second orifice at a maximum flow rate. a housing defining an internal cavity; a first orifice of a first size that is disposed proximate an upstream end of a main pathway that extends longitudinally through the internal cavity; a second orifice of a second size that is larger than the first size disposed proximate a downstream end of the main pathway; one or more first auxiliary pathways that are disposed between the first orifice and the second orifice and that intersect the main pathway; an internal mechanism that automatically moves the first orifice between a first position and a second position wherein: when the first orifice is in the first position, a flow of gas flowing through the outlet assembly flows into the main pathway via the first orifice so that the flow of gas flows through the second orifice at a first flow rate regulated by the first orifice; and when the first orifice is in the second position, the flow of gas primarily bypasses the first orifice and flows into the main pathway via the one or more first auxiliary pathways so that the flow of gas flows through the second orifice at a second flow rate regulated by the first orifice and the one or more first auxiliary pathways, when the first orifice is in the first position, a flow of gas flowing through the outlet assembly flows into the main pathway via the first orifice so that the flow of gas flows through the second orifice at a first flow rate regulated by the first orifice; and when the first orifice is in the second position, the flow of gas primarily bypasses the first orifice and flows into the main pathway via the one or more first auxiliary pathways so that the flow of gas flows through the second orifice at a second flow rate regulated by the first orifice and the one or more first auxiliary pathways, characterized in that the outlet assembly further comprises one or more second auxiliary pathways that are disposed between the first orifice and the second orifice and that intersect the main pathway; wherein the internal mechanism automatically moves the first orifice between the first position, the second position, and a third position; and wherein, when the first orifice is in the third position, the flow of gas primarily bypasses the first orifice and flows into the main pathway via the one or more first auxiliary pathways and the one or more second auxiliary pathways so that the flow of gas flows through the second orifice at a maximum flow rate.