Abstract: A self balancing air handling system for conditioning an interior space includes an air handling unit having an outlet for supplying conditioned air to the space, an entrance providing an access from an exterior space to the interior space, an air plenum surrounding said space, and an inlet for returning air from said plenum to said air handling unit wherein said air handling unit supplies said conditioned air under conditions providing a positive pressure differential at said entrance between the interior space and the exterior space thereby limiting infiltration air into the interior space.

Abstract: An integrated refrigeration and dehumidification unit cooler for a refrigerated space, such as a cold room, includes directly serially connected refrigeration and heating coils operationally interfaced to effect passive control of room temperature and humidity conditions preventing overhead condensation.