I'm shopping for a new gas water heater and looking at possibly purchasing a more efficient version with electric ignition. However, I'm curious as to whether some of the savings will be offset by the electric usage. Does anyone know how many standby watts (or estimated annual KWh) are used by the electric ignition? The specific model I'm considering is linked here, but I am interested in anyone's measurements for similar type of water heaters.
I ended up getting a Rheem XG40T12DM40UO instead. According to my Kill-A-Watt it uses the following amounts of power, depending on the state of the water heater:
- Standby, Idle: <= 1 Watt
- Damper active open/close: ~4 Watts (lasts about 10 seconds or so)
- Active burn: ~4 Watts