Williams gas wall heaters can be purchased directly from retailers, including Home Depot and Consumers Supply Company. F.N. Cuthbert, Inc. is a distributor of Williams gas wall heaters, and can be contacted for information about various Williams heater models, as of 2015.
Home Depot carries two types of Williams gas wall heaters, including the Monterey top-vent gravity heater and the direct-vent high-efficiency heater. The Monterey model is larger and produces 35,000 British thermal units per hour of heating power. While it is powered by natural gas, this model can be powered by propane gas with the optional conversion kit. Another option is the thermostat can be placed either on the wall or inside of the furnace cabinet. The Monterey heater requires no electricity for operation. The 17,700 BtuH direct-vent model is smaller and features two blower speeds, which run quietly. The unit has an electronic ignition and the level of heat can be customized by setting the programmable timer. Its built-in humidifier keeps moisture in the air.
Consumers Supply Company carries several models of Williams gas chimney vent heaters and direct vent heaters. Its larger heaters have a vertical design and can easily heat several rooms. Williams partition gas wall heaters features top-to-bottom air venting, which heats up to three normal-sized rooms. Consumers Supply Company also carries Williams 14,000 Btu gas wall heaters.