The in-wall chiller may include a housing having a size and shape, including a depth of approximately 3.5 inches and a width of approximately 14.5 inches, conductive for installation in a standard size wall frame. The in-wall chiller may further include one or more cooling modules disposed in the housing, which may include a chilling plate coupled to one side of a Peltier chip and a heat sink coupled to the other side, wherein the relatively low temperature transferred to the chilling plate cools water within the in-wall chiller, which may be stored for an extended duration within an insulated storage tank; the heat extracted from the cooled water being transferred to the heat sink and dissipated out from the in-wall chiller by a fan mounted thereon.