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Derek M
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Derek M
@derek-m
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Illustrious Member
Joined: Mar 4, 2021
Last seen: Sep 19, 2024
Profile Activity
Topics: 7 / Replies: 4405
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RE: My Mitsubishi ASHP has used 1078kWh from 25 November to 31 December – Help please

@mjr Hi mjr, Thank you for your input. I suspect that Sarah's system is set in fixed LWT mode. If you have the time could you guide Sarah throug...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: My Mitsubishi ASHP has used 1078kWh from 25 November to 31 December – Help please

Judging by the photo, it would appear that you have had water flowing over the guttering and on to the heat pump. The unit is designed for outside use...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: My Mitsubishi ASHP has used 1078kWh from 25 November to 31 December – Help please

@sarah Could you please show a photo of your heat pump, which should be located outside.

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: My Mitsubishi ASHP has used 1078kWh from 25 November to 31 December – Help please

Hi Sarah, Since you did not provide any heat loss calculations I must assume that you do not have any. Do you have an EPC showing energy consumption...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Keystone COPs? I'm not getting the efficiencies I expected on my Ecodan.

If someone can extract a copy of the code in readable format, I may be able to decipher it.

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Keystone COPs? I'm not getting the efficiencies I expected on my Ecodan.

@kev-m Hi Kev, Sorry if I sounded a little critical, it was not meant to be so, though I do have to perform my duty as 'Devil's Advocate' from tim...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Keystone COPs? I'm not getting the efficiencies I expected on my Ecodan.

@cathoderay You are indeed correct that the overall heat loss, with a setback, will be lower than constant running, which in my hypothetical example...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan. How to run this efficiently with zero understanding.

Do you have any graphs or data? One of the problems is that you cannot compare like for like, since the weather will insist upon changing. The other f...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP on a low income: a cautionary tale

Oh yes there is, it is called a £5000 bribe. 😋

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Keystone COPs? I'm not getting the efficiencies I expected on my Ecodan.

I would suggest trying 60 minutes, since I suspect that the 'time interval' is used to regulate the rate at which the LWT is increased or reduced. By ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Keystone COPs? I'm not getting the efficiencies I expected on my Ecodan.

I am pleased that you are questioning my thought processes, since it is always useful to have ideas and theories double checked. I did state that it...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan. How to run this efficiently with zero understanding.

It is difficult for me to provide definitive answers, since I don't have an Ecodan with which to 'play', so I must rely on the very useful data provid...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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