In the process of dehumidifying and cooling, desiccant in the Dehumidification module absorbs moisture and the desiccant becomes weak and this weak desiccant is returned to the regenerator for water removal. Strong desiccant from the Regenerator is then returned to the Dehumidification module.

These regenerators are multi-effect meaning that energy is reused within the process. Major features include a low-emission, pre-mix boiler accepting natural gas, propane, or town gas, a device for separating steam vapor from the boiling desiccant, a steam condenser that exchanges heat with liquid desiccant, evaporative media wherein this heated desiccant exchanges heat and moisture with a moving air stream, and energy transfer mechanisms including liquid and air heat exchanges.

In operation, dilute desiccant enters a basin where a flow passes through the steam condenser raising its temperature. This desiccant is directed through media where it exchanges its heat with a preheated air stream. This air, now with a low relative humidity, evaporates moisture from the dilute desiccant. The air is then exhausted after passing through the air-to-air exchanger. This evaporation stage accounts for forty percent of needed moisture removal. Next, a flow of this partially regenerated desiccant is raised in temperature by the boiler thereby vaporizing additional moisture. The combined steam-desiccant mixture exiting the boiler is separated with the steam moving to the condenser and the desiccant, following heat exchange, being returned to the Dehumidification module.

The gas regenerator typically serves one liquid desiccant air conditioner with 2,750 to 4,000 cfm air volume in a humid climate and two with 3,600 to 5,500 cfm combined air volume in moderate climates.