Recommended temperature on hot water tank

[JohnMalcolm]

Hi All
I hope you are doing well.
I have this water tank for hot water heated by a Baxi boiler or electrical heater.
What is the recommended temperature on it? I see Danfoss ATC written near the knob.
Is it what the end-user wants or there is a reason behind 50 or 60 Centigrade?
I think it was set to 60 initially but I don't like scalding water so I set it to 40 but then a plumber came over and upped it to 50.
Thank you

 

[Chuck]

40*C in the danger zone for legionella growth. IMO, even 50°C is too low for stored water unless there is a periodic disinfection cycle.

Best practice is to store DHW at 60°C and fit thermostatic mixing valve(s) at the point of delivery to reduce the temperature to between 41°C and 44°C at the point of delivery.

Further information in the TMVA 'Recommended Code of Practice for Safe Water Temperatures' (2020 edn):

https://www.beama.org.uk/static/01a8fa51-9719-4f46-84da2fad6422bf18/2f805035-34f3-49b3-92e6ca8130f732a4/Recommended-Code-of-Practice-for-Safe-Water-Temperatures.pdf