"S Viemeister" wrote in message
...
"Dave Plowman (News)" wrote:

You're right for once. The Americans do think we're mad using combis -
they heat their water by electricity.

Some do. Some use gas. Some even use oil.

Most is by gas with direct acting burners under unvented cylinders.
On-demand water heaters, as Americans call instant water heating, is
regarded as very eco.