The Williams 8967 is Williams’ millivolt wall thermostat kit, supplied with thermostat wire and a wire nut. It runs on the millivolt current produced by the heater’s pilot generator, so no separate electrical supply is needed.

Williams lists the 8967 for its millivolt-controlled heaters, including:

• Monterey top-vent wall furnaces
• Direct-vent gravity wall furnaces
• Vented console room heaters

The 8967 replaces the earlier Williams P322016 wall thermostat.