Moisture Vaporators provide a limitless, albeit slower and energy-consuming, supply of water from the atmosphere once water deposits are no longer a viable option. Production is lowered when placed near other Vaporators. They also cannot produce during Dust Storms.
Moisture Vaporators are based on WAVAR tech (Water-Vapor Adsorption Reactor), a process that extracts water directly from the Martian atmosphere by alternately blowing air over a zeolite adsorption bed and heating the bed to extract the absorbed water. While the water output is less than that of the Water Extractor, there is no end to the amount of water it can generate, and its mechanical simplicity means they can be deployed anywhere on the surface.