Abstract: An air handling system including at least one terminal unit for maintaining a serviced volume at a predetermined temperature below the temperature of the air supplied by the central source of the air handling system is provided through the use of a refrigerant means in the form of a passive thermal energy recovery device which provides heat transfer between the outgoing and inflowing air streams provided by the a central air handling system. The heat transfer between air streams is regulated as a function of air velocity and temperature differentials as measured at various points in system which are related specifically to the serviced volume. Environmental control within the serviced volume is exercised by controlling face and bypass dampers to regulate the air flow through the passive heat exchanger and the air exchange rate is controlled by modulating the operation of the dampers or by regulating the air flow into or out of the serviced volume by way of supply and/or exhaust louvers.

Abstract: An air handling system including at least one terminal unit for maintaining a serviced volume at a predetermined temperature below the temperature of the air supplied by the central source of the air handling system is provided through the use of a refrigerant means in the form of a passive thermal energy recovery device which provides heat transfer between the outgoing and inflowing air streams provided by the a central air handling system. The heat transfer between air streams is regulated as a function of air velocity and temperature differentials as measured at various points in system which are related specifically to the serviced volume. Environmental control within the serviced volume is exercised by controlling face and bypass dampers to regulate the air flow through the passive heat exchanger and the air exchange rate is controlled by modulating the operation of the dampers or by regulating the air flow into or out of the serviced volume by way of supply and/or exhaust louvers.

Abstract: An air handling system including at least one terminal unit for maintaining a serviced volume at a predetermined temperature with constant or variable volume control wherein a thermal energy wheel provides heat transfer between the outgoing and inflowing air streams provided by the air handling system via the terminal unit. The heat transfer between air streams is regulated as a function of air velocity and temperature differentials as measured at various points in system which are related specifically to the serviced volume. The regulation is exercised by controlling the angular velocity of the means for transferring thermal energy.