Dropping the flow temperature to 60c

wild666

I've set the temperature on my water for the heating at 40 degrees with the thermostat set at 16 degrees that is fine for me. I use a hot water bottle as well and don't feel the cold. There's no heating on at the moment and I'm not using a hot water bottle and everything is fine with the inside temperature at 16 degrees. 
I got the heating at 16 degrees by lowering the temperatures over time 5 degrees on the water and 1 degrees on the heating each week until I found it too cold then increased the temperatures by 1 degrees, thermostat at 15 and boiler at 36 was when I felt cold so upped it to 40/16 and it's being that since Jan 2022 when I put the heating on.

pensionpawn

wild666 said:

I've set the temperature on my water for the heating at 40 degrees with the thermostat set at 16 degrees that is fine for me. I use a hot water bottle as well and don't feel the cold. There's no heating on at the moment and I'm not using a hot water bottle and everything is fine with the inside temperature at 16 degrees. 
I got the heating at 16 degrees by lowering the temperatures over time 5 degrees on the water and 1 degrees on the heating each week until I found it too cold then increased the temperatures by 1 degrees, thermostat at 15 and boiler at 36 was when I felt cold so upped it to 40/16 and it's being that since Jan 2022 when I put the heating on.

Legionella is only prevented at 60c+

wild666

pensionpawn said:

wild666 said:

I've set the temperature on my water for the heating at 40 degrees with the thermostat set at 16 degrees that is fine for me. I use a hot water bottle as well and don't feel the cold. There's no heating on at the moment and I'm not using a hot water bottle and everything is fine with the inside temperature at 16 degrees. 
I got the heating at 16 degrees by lowering the temperatures over time 5 degrees on the water and 1 degrees on the heating each week until I found it too cold then increased the temperatures by 1 degrees, thermostat at 15 and boiler at 36 was when I felt cold so upped it to 40/16 and it's being that since Jan 2022 when I put the heating on.

Legionella is only prevented at 60c+

But I don't use the water from the hot tap for anything except filling up a bowl after putting in 1.7 litres of boiling water from the kettle.

matelodave

pensionpawn said:

wild666 said:

I've set the temperature on my water for the heating at 40 degrees with the thermostat set at 16 degrees that is fine for me. I use a hot water bottle as well and don't feel the cold. There's no heating on at the moment and I'm not using a hot water bottle and everything is fine with the inside temperature at 16 degrees. 
I got the heating at 16 degrees by lowering the temperatures over time 5 degrees on the water and 1 degrees on the heating each week until I found it too cold then increased the temperatures by 1 degrees, thermostat at 15 and boiler at 36 was when I felt cold so upped it to 40/16 and it's being that since Jan 2022 when I put the heating on.

Legionella is only prevented at 60c+

Probably a really good idea to get the facts right, legionella dies of at a lower temperature than 60 degrees but takes a bit longer, likewise very low concentrations of chlorine like there is in mains water also kills it.

Generally if your hot water comes via a combi or non-vented hot water tank you should be reasonably safe at almost any temperature because its' still got chlorine in it and hasn't been stored.
However if your hot water comes via an incubation tank in the loft then, assuming that your hot water tank is kept at 50 degrees or above you should also be pretty safe.

Astria

matelodave said:

pensionpawn said:

wild666 said:

I've set the temperature on my water for the heating at 40 degrees with the thermostat set at 16 degrees that is fine for me. I use a hot water bottle as well and don't feel the cold. There's no heating on at the moment and I'm not using a hot water bottle and everything is fine with the inside temperature at 16 degrees. 
I got the heating at 16 degrees by lowering the temperatures over time 5 degrees on the water and 1 degrees on the heating each week until I found it too cold then increased the temperatures by 1 degrees, thermostat at 15 and boiler at 36 was when I felt cold so upped it to 40/16 and it's being that since Jan 2022 when I put the heating on.

Legionella is only prevented at 60c+

Probably a really good idea to get the facts right, legionella dies of at a lower temperature than 60 degrees but takes a bit longer, likewise very low concentrations of chlorine like there is in mains water also kills it.

Generally if your hot water comes via a combi or non-vented hot water tank you should be reasonably safe at almost any temperature because its' still got chlorine in it and hasn't been stored.
However if your hot water comes via an incubation tank in the loft then, assuming that your hot water tank is kept at 50 degrees or above you should also be pretty safe.

Also, legionella requires standing water to multiply, so even if the tank is kept at 40c, its only really a concern if it's kept at that temperature for long periods of time and left standing, the more you use from the tank the less likely growth will be a problem, if you use the whole tank every day the chance of growth is near zero. Running a legionella cycle every few weeks (or ever week if you use very little of the water *) where the tank is brought upto 60c will kill off any growth in about 2 minutes.

That said, illnesses caused by legionella in residential properties are incredibly rare, it's normally commercial properties where it multiplies.

* - if you really use so little water and don't have a combi-boiler then it may be more economical to use electric water heating.