A gas chromatography system comprising: a gas chromatography oven including: a housing defining an oven chamber and an intake port fluidly communicating with the oven chamber; and a fluid flow generating system including a radial flow impeller configured to generate a radially directed forced fluid flow; and a gas chromatography column disposed in the oven chamber; wherein the oven is configured to selectively operate in each of: a cooling mode wherein the radial flow impeller generates a cooling fluid flow that is drawn from the intake port and flows about the column and out of the oven chamber; and alternatively a recirculating mode wherein the radial flow impeller generates a recirculating fluid flow (F11, F14, F15) within the oven chamber that repeatedly flows about the column and back to the radial flow impeller; wherein the oven includes at least one baffle (130; 132) in the oven chamber defining an exit channel and a return channel; the cooling fluid flow flows through the exit channel to an exhaust port; the recirculating fluid flow flows through the return channel to the radial flow impeller; in each of the cooling mode and the recirculating mode, the radial flow impeller discharges a forced fluid flow radially outwardly therefrom; the column is configured in a substantially circular column loop; and the radial flow impeller is located within the column loop so that the forced fluid flow is directed toward the column. a gas chromatography oven including: a housing defining an oven chamber and an intake port fluidly communicating with the oven chamber; and a fluid flow generating system including a radial flow impeller configured to generate a radially directed forced fluid flow; and a housing defining an oven chamber and an intake port fluidly communicating with the oven chamber; and a fluid flow generating system including a radial flow impeller configured to generate a radially directed forced fluid flow; and a gas chromatography column disposed in the oven chamber; wherein the oven is configured to selectively operate in each of: a cooling mode wherein the radial flow impeller generates a cooling fluid flow that is drawn from the intake port and flows about the column and out of the oven chamber; and alternatively a recirculating mode wherein the radial flow impeller generates a recirculating fluid flow (F11, F14, F15) within the oven chamber that repeatedly flows about the column and back to the radial flow impeller; wherein the oven includes at least one baffle (130; 132) in the oven chamber defining an exit channel and a return channel; the cooling fluid flow flows through the exit channel to an exhaust port; the recirculating fluid flow flows through the return channel to the radial flow impeller; in each of the cooling mode and the recirculating mode, the radial flow impeller discharges a forced fluid flow radially outwardly therefrom; the column is configured in a substantially circular column loop; and the radial flow impeller is located within the column loop so that the forced fluid flow is directed toward the column. a cooling mode wherein the radial flow impeller generates a cooling fluid flow that is drawn from the intake port and flows about the column and out of the oven chamber; and alternatively a recirculating mode wherein the radial flow impeller generates a recirculating fluid flow (F11, F14, F15) within the oven chamber that repeatedly flows about the column and back to the radial flow impeller; wherein the oven includes at least one baffle (130; 132) in the oven chamber defining an exit channel and a return channel; the cooling fluid flow flows through the exit channel to an exhaust port; the recirculating fluid flow flows through the return channel to the radial flow impeller; in each of the cooling mode and the recirculating mode, the radial flow impeller discharges a forced fluid flow radially outwardly therefrom; the column is configured in a substantially circular column loop; and the radial flow impeller is located within the column loop so that the forced fluid flow is directed toward the column.