On Fri, 29 Jan 2016 10:48:24 -0500, S Viemeister
> wrote:

>On 1/29/2016 9:56 AM, Ophelia wrote:
>> "Ophelia" > wrote
>>> "S Viemeister" > wrote in message
>>>> Indeed. But the self-heating of washer and dishwasher water, is yet
>>>> another difference between typical US and UK homes.
>>>
>>> They don't?? Blimey!
>>
>> So, how do you get the temp right for the type of stuff you are washing?
>>
>Cross your fingers and hope?

Most washers have a temperature control (typically Cold, Medium, Hot),
it's a mixing valve for the hot and cold input... mine has separate
settings for Wash and Rinse. My on demand tankless water heater can
be set to different temperatures in 5ºF increments up to 120ºF. The
installer suggested setting it to 115ºF and that's where it is, plenty
hot enough for showering, in fact I mix in a little cold or it's too
hot. Set at 115ºF there's never a worry about anyone scalding
themself and saves money by not over heating a big tank of water 24/7
and then needing to temper it with cold to make it usable.