On Tuesday, October 20, 2015 at 3:43:34 PM UTC-4, Dave Smith wrote:
> On 2015-10-20 3:28 PM, Brooklyn1 wrote:
>
> > Firstly 140ºF is much too hot for domestic hot water, it'll scald you
> > so you'd have to temper it with cold at the tap... what a waste of
> > energy... 115ºF is plenty hot enough for bathing/laundry.
>
>
> I figure I don't need my hot water to be any hotter than I can bear on
> my skin. When I have a shower I can crank it up to full blast.

Although it's very rare, legionella is a possibility in home hot
water systems. I'd as soon keep my water heater high enough to
kill it.

The ideal range for legionella is 68 to 122 F; at 123-130 F legionella
can survive but not multiply; at 132-140 F legionella is dead within
30 minutes.

I should time how long it takes to get hot water at the kitchen tap;
it seems like an eternity considering how small my house it, but it
can't be all that long.

Cindy Hamilton