The present disclosure involves a free cooling temperature conditioning system having an air handling assembly having a first cooling coil. The first cooling coil includes an intake port receiving coolant at a first temperature and further includes an output port for the coolant at a second temperature. The air handing assembly receives return air flow from a space being temperature conditioned, where the return air flows over the first cooling coil to condition the return air to supply air. The air handing assembly delivers the supply air into the space being temperature conditioned. The conditioning system also includes a controller configured to maintain a temperature difference between the second temperature and the first temperature.