Time for a little education.
Check the link to see what piezoelectricity is.
http://en.wikipedia.org/wiki/Piezoelectricity

Then rest assured that the ignition spark does not need any external
electricity.
It is all self contained
Charlie


"Robert11" wrote in message
...
Hello:

Will be going for a new hot water heater soon.
For a residence. The typical cylindrical type independent of the furnace.

Regarding those new gas fired water heaters with the Piezo ignition:

Do they work in a house power outage, such as in a storm ?
We lose power often, and would sure like to have, at least, hot water.

Thanks,
B.