==== Legionnaires' disease ====

[[https://www.cdc.gov/legionella/index.html|Legionnaires' (LEE-juh-nares) disease]] is a serious type of pneumonia (lung infection) caused by Legionella (LEE-juh-nell-a) bacteria. People can get sick when they breathe in small droplets of water or accidently swallow water containing Legionella into the lungs.

=== Dokumentation ====

== Reading material ==
From the Danish "Teknologisk Institut" I have {{ :bms:bestpractice:water:rorcenter-anvisning_017._legionella.pdf |this description}} (In Danish, anything similar in English would be much appreciated)

And also a {{ :bms:bestpractice:water:2018_12_03_legionella_pjece.pdf |smaller brochure}}.

== Tables ==
What we can use from theese is a table that very clearly describes when the legionella bacteria dies.
{{:bms:bestpractice:water:tids_tabel.png?400|table}}

<WRAP>
^Temperature Celsius^The effectivenes on Legionella bacteria^
^Below 20 °C|Legionella will survive but would often be in hibernation|
^20 °C - 50 °C|Legionella growth, optimum conditions is 35 °C to 46 °C|
^Above 50 °C|Legionella can survive but won't grow|
^55 °C|Legionella dies within 5-6 hours|
^60 °C|Legionella dies within 30 minutes, but high risc of calcium deposits in pipes|
^66 °C|Legionella dies within 2 minutes|
</WRAP>
<WRAP clear></WRAP>

=== Recomendations / Best Practice ===

Recommended operations temperature 

  * Minimum 50 °C
  * Preferred 55 °C
  * At most 60 °C

And at least a minimum of 50 °C in the entire pipe system.

=== Water heater ===

With a water heater you should raise the temperature to above 65 °C for 10 minutes weekly, and keep the temperature at 

=== Water heater with circulation ==

With a water heater with circulation you should raise the temperature to above 65 °C measured in return temperature.

=== Cold water ===

At most 20 °C but recommended below 10 °C

~~DISCUSSION~~