APPLIANCE; GAS. A fixture or apparatus manufactured and designed to use natural, manufactured, mixed, or other gas as a medium for developing light, heat, or power, and including, but not limited to, gas ranges, gas room heaters, gas steam and hot water boilers, and gas burners of all kinds, together with any attachments or apparatus designed to be attached to any gas appliance, such as solid tops, pilot lights, governors, regulators, fuel savers, and safety devices.