[clug] Hot water systems (was Re: 24" LCDs )

bnc bnc at netspeed.com.au
Tue May 5 01:05:53 GMT 2009


On Tue, 05 May 2009 10:36:57 +1000
Alex Satrapa <alexsatrapa at mac.com> wrote:

> On 04/05/2009, at 22:33 , Sam Couter wrote:
> > The water isn't quite
> > as hot either, only 50C instead of 70 or 80C. I haven't measured how
> > much water I'm wasting, but between the grey water system and the
> > rain water tank I think I make up for it.
> I'm pretty sure that 50C is the standard these days[1], to avoid  
> people accidentally scalding themselves with water hot enough to
> wash dishes in. Nevermind that some lovely friendly bugs such as
> Legionella love temperatures in the 35-45C range, but can't stand
> water hotter than 55C[2]. Most instant hot water systems will let you
> install a 55C controller in the kitchen.
Actually I am pretty sure it is only required to be 55 in the bathroom.
You can get a splitter that takes a separate(hotter) feed to your

> My cynical self is wondering whether the folks recommending colder  
> "hot" water had shares in Dishlex. Then again, who is going to
> police the water temperature?
Your insurance company.

> Alex
> [1] Australian Standard AS 3500.4, 1997
> [2] http://en.wikipedia.org/wiki/Legionella

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