wrote
Rod Speed wrote

Thats on the low side of the recommendations,
60C, 140F is much more common.
http://www.google.com.au/search?q=Legionella+60+C

You get more hits for
http://www.google.com.au/search?q=Legionella+50+C

You cant just count the hits, you need to consider the source.

And most of those hits with 50C are actually saying that
at that temp and below Legionella is a serious problem.

http://www.google.com/search?q=Legionella+50oC
gives a shorter list, and has some interesting links.

Nope, none that are useful on that question which
substantiate their claims with rigorous science.

http://www.dhmh.state.md.us/html/legionella.htm
says you are just plain wrong using rigorous science.

I see adherence to the earlier advice.

You need new glasses then.

"Legionella die rapidly at 55oC (131o F)(3 log reduction within 1
hour), and are killed almost immediately at temperatures over 60oC
(140oF)."

Useless for your previous claim about 120F

It was present in the tested systems because they were kept below 43c.

Didn't you say, "Water with chlorine added, ie city water supplies
will be ok. Well water needs special treatment.", earlier?

No, that was someone else.

Chlorine doesnt help much with STORAGE WATER HEATERS.

" As legionella is chlorine tolerant, it will survive many of the
standard municipal water treatment protocols. Once present
in a hospital hot water system, legionella is able to survive and
multiply, particularly as hot water temperatures are kept relatively
low to minimize the scald risk for patients [35]. In Maryland, state
regulations for nursing homes limit temperatures at the outlet to
110oF [43oC](COMAR 10.07.02); "

Again, so much for your 120F wrote:
In alt.solar.thermal Rod Speed wrote:

Thats on the low side of the recommendations,
60C, 140F is much more common.
http://www.google.com.au/search?q=Legionella+60+C


You get more hits for
http://www.google.com.au/search?q=Legionella+50+C

http://www.google.com/search?q=Legionella+50oC
gives a shorter list, and has some interesting links.


http://www.dhmh.state.md.us/html/legionella.htm
says you are just plain wrong using rigorous science.

I see adherence to the earlier advice.

"Legionella die rapidly at 55oC (131o F)(3 log reduction within 1
hour), and are killed almost immediately at temperatures over 60oC
(140oF)."

It was present in the tested systems because they were kept below 43c.

Didn't you say, "Water with chlorine added, ie city water supplies
will be ok. Well water needs special treatment.", earlier?

" As legionella is chlorine tolerant, it will survive many of the
standard municipal water treatment protocols. Once present in a
hospital hot water system, legionella is able to survive and
multiply, particularly as hot water temperatures are kept relatively
low to minimize the scald risk for patients [35]. In Maryland, state
regulations for nursing homes limit temperatures at the outlet to
110oF [43oC](COMAR 10.07.02); "