Any power vented gas water heater will require electricity to function correctly. More modern gas ranges will too, if they support child safety features, such a

Any power vented gas water heater will require electricity to function correctly. More modern gas ranges will too, if they support child safety features, such as range lock-out, which may be required in some locales. Same goes for gas fireplaces that do not have a standing pilot and electrically actuated valves, which many newer appliances have.