2 water cycles a day for me and girlfriend seem off, its actually 7/9am and 5-7pm. Noticed some times cold taps have hot water so doubt thats right.

Posted by: @newhouse87

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Feck sake, yeah get whys its so hot now. so i could just lag all the copper pipes. Not sure about me doing stuff with valves and sensors though. He surley checked that flow and returns are within specs. How could installer be that shabby or is it just most people dont question things?

Did your installer come riding a horse and wearing a 'ten gallon hat'?  

It is unfortunately the case that the sort of issues we're discussing here are all too common @newhouse87

Within in the general population there's too little knowledge /understanding about energy matters. We teach 14-16 year-olds about joules when at school, but hardly any adult would be able to take that concept forward and have the slightest idea of how much energy is needed to heat a cylinder of water to 50degC.

In 2021 the UK Dept of Business, Energy and Industrial Services (BEIS) spent £15m on 3 projects to trial heat pumps across a statistically-selected set of 750 houses. I was in communication with those in a batch of 250 based in SE England. They shared photos and descriptions on a (private) online Forum. I didn't see a single installation that would've passed the requirements of Building Regs, MCS standards and manufacturers' warranties. The largest of the government-approved installation companies was 'removed' from the Trial.

It's very rare that an accredited heating installer will spend the time & effort to get the pipe lagging correct. It's all too common to find it gets left to the most junior apprentice.

Have a look at this 4min YouTube video from the pipe insulation manufacturer, Climaflex:

Posted by: @transparent

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It is unfortunately the case that the sort of issues we're discussing here are all too common @newhouse87

Within in the general population there's too little knowledge /understanding about energy matters. We teach 14-16 year-olds about joules when at school, but hardly any adult would be able to take that concept forward and have the slightest idea of how much energy is needed to heat a cylinder of water to 50degC.

In 2021 the UK Dept of Business, Energy and Industrial Services (BEIS) spent £15m on 3 projects to trial heat pumps across a statistically-selected set of 750 houses. I was in communication with those in a batch of 250 based in SE England. They shared photos and descriptions on a (private) online Forum. I didn't see a single installation that would've passed the requirements of Building Regs, MCS standards and manufacturers' warranties. The largest of the government-approved installation companies was 'removed' from the Trial.

It's very rare that an accredited heating installer will spend the time & effort to get the pipe lagging correct. It's all too common to find it gets left to the most junior apprentice.

Have a look at this 4min YouTube video from the pipe insulation manufacturer, Climaflex:

 

Thats most of the settings i could find. Essentially i think its taking too long to heat up  rooms. Just hoping somebody here may notice something wrong with some settings. Think i need fo to alter my dhw schedule anyway. My cop is 3.05 if my calculations are correct of total energy produced/consumed. Pump making funny sounds abit too like slight revving up and down.

@newhouse87

I will try to reply sometime tomorrow.

What is the size and type of your home? What is the model of your heat pump? Do you have radiators, under floor heating, or both? Do you have thermostats and/or TRV's.

How do you normally operate your system, on - off or continuous?

@derek-m thanks man,

2600sqft, 11kw daikin low temp alterma3 split. All ufh - bungalow and have thermostats in most rooms. Screeded floor

Not sure what you mean by how i operate my system, essentially starts flowing when stats call for heat. As you can tell im bit in the dark about how it all works. Ran on weather compensation mode so maybe that's bit low .

Posted by: @newhouse87

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@derek-m thanks man,

2600sqft, 11kw daikin low temp alterma3 split. All ufh - bungalow and have thermostats in most rooms. Screeded floor

Not sure what you mean by how i operate my system, essentially starts flowing when stats call for heat. As you can tell im bit in the dark about how it all works. Ran on weather compensation mode so maybe that's bit low .

You have answered the question, you are operating the heat pump as you would a gas boiler. Do you know the heat loss calculation for your home? Are you on any time of use electricity tariff?

@derek-m The heat pump is switched on always but only flows through lops when stats open them., presume thats how most people run them?

@newhouse87 - clarifications.....

... take care when reading the questions here because we don't want to make incorrect assumptions.

1:@derek-m asked about how you operate the heat-pump, and you've replied with how the manifold supplies heated water to the UFH loops. That suggests to me that there is no intermediate store of water between the HP and the UFH manifold. Is that correct?

A storage vessel can make a lot of difference. In the diagram you will see that there's an additional input from a solar-thermal panel.
Without the water storage this would be impossible to achieve.

2. Your Energy Report states that there's also a whole-house MVHR system.

Does this have any input from the heat-pump, or are these systems entirely separate?

If so, does that mean they use independent thermostats?

@transparent

this might help a bit