Abstract: Various embodiments provide a make-up air unit, comprising a first air inlet defining a portion of a first path and a portion of a second path; a second air inlet defining a third path that joins with the first path; a dehumidification unit disposed within the first path; an air conditioner with a portion of the air conditioner disposed within the first path downstream of where the third path joins the first path, and a portion of the air conditioner disposed within the third path; a first air outlet where the first path exits the make-up air unit; and a second air outlet wherein the second path exits the make-up air unit; wherein the air conditioner is disposed on a stand; wherein the dehumidification unit is disposed below the air conditioner; and wherein the first path is isolated from the third path.

Abstract: Various embodiments include a system for controlling air temperature. The system can include a potable water piping system, a cooling system, and a heating system. The potable water piping system can include potable water supply piping and potable water return piping. The cooling system can be coupled to the potable water piping system. The cooling system can include a water-refrigerant heat exchanger; an air-refrigerant coil; a compressor coupled between the water-refrigerant heat exchanger and the air-refrigerant coil; and an expansion valve coupled between the water-refrigerant heat exchanger and the air-refrigerant coil. The heating system can be coupled to the potable water piping system. The heating system can include a hot water coil. The water-refrigerant heat exchanger can be coupled to the potable water supply piping and the potable water return piping. The hot water coil can be coupled to the potable water supply piping and the potable water return piping.

Abstract: Various embodiments include a system for controlling air temperature. The system can include a potable water piping system, a cooling system, and a heating system. The potable water piping system can include potable water supply piping and potable water return piping. The cooling system can be coupled to the potable water piping system. The cooling system can include a water-refrigerant heat exchanger; an air-refrigerant coil; a compressor coupled between the water-refrigerant heat exchanger and the air-refrigerant coil; and an expansion valve coupled between the water-refrigerant heat exchanger and the air-refrigerant coil. The heating system can be coupled to the potable water piping system. The heating system can include a hot water coil. The water-refrigerant heat exchanger can be coupled to the potable water supply piping and the potable water return piping. The hot water coil can be coupled to the potable water supply piping and the potable water return piping.