ASHP & triple glazing

[Joeboy]

Do you need 55℃ for DHW? Maybe see if SWMBO notices 45℃…

Bloody hell, you're brave. She is atuned... I'll try 50 but it's my life I'm playing with.

50 set, if you don't hear from me tomorrow I did not survive the test.

[AGT]

Some mixing valves look for a 10 deg difference, we set our DHW to 48deg C

[resybaby]

Need to watch the HW temps for legionella purposes.
20-45 = prime breeding temps
60+ = kills it off.

Id suggest 'cooking' upto 60 fairly regularly

[Stinsy]

Need to watch the HW temps for legionella purposes.
20-45 = prime breeding temps
60+ = kills it off.

Id suggest 'cooking' upto 60 fairly regularly

Let's not overblow things!

Official guidelines are that you should heat the tank to 60℃ once a fortnight to prevent legionella. However, in the real world, if you're using the water daily it isn't a problem.

[AGT]

I wouldn’t get too worried about legionella in a domestic setting with daily usage/good turnover assuming no issues with immune system.

Different if it’s a place of work and L8 applies

[Ronski]

Good information at https://www.heatgeek.com/hot-water-temp ... egionella/

He has his hot water set at 45c and never runs a legionella cycle.

[resybaby]

Bacteria doesnt read the Building Regs manuals

[Bugtownboy]

One thing to remember are seldom used runs - particularly any bathroom/shower room that’s seldom used.

I’d be more focused on giving them a regular flush - we would always use 60oC if the area wasn’t used weekly.

In a domestic setting, shower heads are a biggie - big area for the Legionella pneumophila to grow and great opportunity for aerosol production when used.

Legionella pneumonia is bad news.

[Joeboy]

Legiona cycle is set to auto.

Thanks guys, much appreciated

[Joeboy]

I survived the 50 deg dhw test. I'll leave it there.

Day 4 begins of the logbasket not being refilled.



We have settled on 25kWhs to recharge system, down from 50kWh's Managed to export a little too. Combined that bring us very close to the £2.50 per day difference since ashp went in. Plus a 75% reduction in log use.



Another typical graph.


Edit- plus half a quid off daily for no gas s/c. That makes us £21 a week ahead of our personal game. I find that incredible. Especially as we went from 100% electric to 100% electric. If I tried to include hypothetical gas costs...