Abstract: In accordance with the present invention, a space conditioning system having multi-stage cooling and dehumidification capability is provided. The system includes plural refrigeration circuits operable in a cooling mode to provide cooled air to an indoor space. At least one of the refrigeration circuits is also operable in a reheat mode, wherein air is dehumidified by cooling it and then reheating it before it is supplied to the space. A control system is provided for controlling the operation of the refrigeration circuits to satisfy both a demand for cooling and a demand for dehumidification. Depending upon the level of demand for cooling, the system is operated to satisfy the dehumidification demand and the cooling demand simultaneously. However, in response to a higher level of demand for cooling (e.g., a second stage demand, or in some cases, a higher demand), the demand for cooling takes priority over the dehumidification demand.

Abstract: In accordance with the present invention, a space conditioning system having multi-stage cooling and dehumidification capability is provided. The system includes plural refrigeration circuits operable in a cooling mode to provide cooled air to an indoor space. At least one of the refrigeration circuits is also operable in a reheat mode, wherein air is dehumidified by cooling it and then reheating it before it is supplied to the space. A control system is provided for controlling the operation of the refrigeration circuits to satisfy both a demand for cooling and a demand for dehumidification. Depending upon the level of demand for cooling, the system is operated to satisfy the dehumidification demand and the cooling demand simultaneously. However, in response to a higher level of demand for cooling (e.g., a second stage demand, or in some cases, a higher demand), the demand for cooling takes priority over the dehumidification demand.

Abstract: An averaging temperature probe is disclosed wherein a sensor strip extends from a mounting plate substantially across a stratified airflow. Temperatures at points spaced along the sensor strip are measured and averaged by circuitry to provide a more accurate representation of the actual or mixed airflow temperature.

Abstract: An interface is disclosed for operatively interconnecting a conventional thermostat and an electronically commutated motor ("ECM"). The interface provides enable, heating and rate signals to the ECM in response to the conventional fan, heat, valve and airflow signals from the thermostat.

Abstract: A control for regulating relative humidity in an enclosure including a thermostat, a relative humidity sensor, a refrigeration compressor and an air blower. The compressor is run at low or high speeds in response to thermostat demand. Whenever the relative humidity is excessive the compressor low speed control is overridden to effect high compressor speed.