A vehicle, comprising: a first exhaust muffler arranged to receive a first exhaust flow from a first engine; a transport refrigeration unit arranged to condition an interior of a compartment of the vehicle, comprising: a second exhaust muffler arranged to receive a second exhaust flow from a second engine associated with the TRU; and a fluid circuit, comprising: a first heat exchanger having a first heat exchanger first inlet arranged to receive at least one of the first exhaust flow and the second exhaust flow, a first heat exchanger second inlet arranged to receive a coolant, a first heat exchanger first outlet arranged to release at least one of the first exhaust flow and the second exhaust flow, and a first heat exchanger second outlet, characterized in that the TRU further comprises: a valve assembly coupled to a second heat exchanger having a second heat exchanger first inlet arranged to receive the coolant from the first heat exchanger second outlet, a second heat exchanger second inlet arranged to receive gas from a gas tank supported on a vehicle body for storing gas for use in at least one of the first engine and the second engine, a second heat exchanger first outlet fluidly connected to the first heat exchanger second inlet, and a second heat exchanger second outlet arranged to direct gas to the TRU, wherein the valve assembly is integrated with the second heat exchanger such that the second heat exchanger directly heats the valve assembly to prevent frost formation on the valve assembly. a first exhaust muffler arranged to receive a first exhaust flow from a first engine; a transport refrigeration unit arranged to condition an interior of a compartment of the vehicle, comprising: a second exhaust muffler arranged to receive a second exhaust flow from a second engine associated with the TRU; and a fluid circuit, comprising: a first heat exchanger having a first heat exchanger first inlet arranged to receive at least one of the first exhaust flow and the second exhaust flow, a first heat exchanger second inlet arranged to receive a coolant, a first heat exchanger first outlet arranged to release at least one of the first exhaust flow and the second exhaust flow, and a first heat exchanger second outlet, characterized in that the TRU further comprises: a valve assembly coupled to a second heat exchanger having a second heat exchanger first inlet arranged to receive the coolant from the first heat exchanger second outlet, a second heat exchanger second inlet arranged to receive gas from a gas tank supported on a vehicle body for storing gas for use in at least one of the first engine and the second engine, a second heat exchanger first outlet fluidly connected to the first heat exchanger second inlet, and a second heat exchanger second outlet arranged to direct gas to the TRU, wherein the valve assembly is integrated with the second heat exchanger such that the second heat exchanger directly heats the valve assembly to prevent frost formation on the valve assembly. a valve assembly coupled to a second heat exchanger having a second heat exchanger first inlet arranged to receive the coolant from the first heat exchanger second outlet, a second heat exchanger second inlet arranged to receive gas from a gas tank supported on a vehicle body for storing gas for use in at least one of the first engine and the second engine, a second heat exchanger first outlet fluidly connected to the first heat exchanger second inlet, and a second heat exchanger second outlet arranged to direct gas to the TRU, wherein the valve assembly is integrated with the second heat exchanger such that the second heat exchanger directly heats the valve assembly to prevent frost formation on the valve assembly.