Heat pump or immersion hot water?

[nowty]

Why do you need your DHW hotter than 50c or are you storing and blending?

To reduce risk of legionella.

OMG. How much money do you spend on something that doesn't exist in the domestic setting! Legionella only exists in standing warm water. Domestically is always getting a dose of chlorine... Every time you turn on the tap.

I'm only talking about 5 degrees extra which is usable without blending and also increases the effective energy storage capacity of the tank.

[Windbag]

For storage I get it.
But then that is very hot tap water, is there a scalding risk?

I run our tank at 45c, because it has replaced the tumble dryer.

[nowty]

For storage I get it.
But then that is very hot tap water, is there a scalding risk?

I run our tank at 45c, because it has replaced the tumble dryer.

Its hot but not scalding hot, and most of our outlets have blending taps.
I used to run a smaller tank at a hotter temp with a blending valve, but decided against repeating that with the newer larger tank to make it as simple as possible.

[Windbag]

Got it. Getting a bit off-topic on my own thread.

I settled on larger tank & tank blender, for easiness.

[Tinbum]

For storage I get it.
But then that is very hot tap water, is there a scalding risk?

I run our tank at 45c, because it has replaced the tumble dryer.

New houses now have to have temperature limitation at the tap.

[Andy]

Why do you need your DHW hotter than 50c or are you storing and blending?

I am blending at the output so a higher temperature gives me more hot water.

[AGT]

I’ve had to repair ASHP at work that are never really off(commercial application)

Cost of this is thousands so anything that gives the ASHP a break is a good idea, so immersion on cheap tariff is compatible to ASHP cop of 3.

Gives mechanical parts time to chill out when using immersion

[Yuff]

Having read this thread earlier, I was thinking should I turn the ASHP’s off during the summer, when we don’t use any heating, and just let the immersion and solar heat the water.
Not sure if this is a good idea or not, but the heat pump is topping up the feeder tank, through the day, which I assume doesn’t really need topping up if I’m not using any heating….

[marshman]

__

[AE-NMidlands]

Having read this thread earlier, I was thinking should I turn the ASHP’s off during the summer, when we don’t use any heating, and just let the immersion and solar heat the water.
Not sure if this is a good idea or not, but the heat pump is topping up the feeder tank, through the day, which I assume doesn’t really need topping up if I’m not using any heating….

Is a heat pump like a car's air conditioning system? I believe that it needs to be run periodically to lubricate the seals or something, I'm sure my son was told the reason his refrigerant had disappeared was because he hadn't run it.
A