An air temperature and humidity control device is provided including a heat pump and a humidity controller. The heat pump has a condenser, a first evaporator, a compressor, and a second evaporator. The humidity controller includes a first contactor fluidly coupled to the second evaporator. The first contactor includes at least one contact module having a porous sidewall that defines an internal space through which a liquid desiccant flows. A liquid source is coupled to the first contactor such that a second liquid provided by the liquid source flows through the first contactor adjacent an external side of the porous sidewall. Heat and/or water vapor transfers between the second liquid and the liquid desiccant.