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bontwoody
bontwoody
@bontwoody
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Joined: Mar 5, 2022
Last seen: May 6, 2025
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Topics: 28 / Replies: 777
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RE: Is it crucial to get flow temperatures with heat pumps right?

@alfapat It is larger than it looks at 200+ m2 but didn’t you say that was the old EPC before the insulation improvements? Im just struggling to se...

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

@goody I couldn’t agree more! I just meant they usually get it wrong in the opposite direction and leave a grossly oversized heat pump 😁

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Is it crucial to get flow temperatures with heat pumps right?

@alfapat No it wasn’t attached to the email. Can you resend it please.

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Is it crucial to get flow temperatures with heat pumps right?

@alfapat Im even more confused now as looking at the house I wouldnt have guessed more than 8kW would be needed. Thats not an exact science I know but...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Is it crucial to get flow temperatures with heat pumps right?

@alfapat The lockshield valve is the one opposite the TRV. Heat pumps dont play well with TRVs and they are not necessary when using water law. Just s...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Is it crucial to get flow temperatures with heat pumps right?

@alfapat So the EPC pretty much matches the heat calculation. By all means tweak and see it that helps. If it doesnt then try to look at any upgrade...

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

@cathoderay I think you should qualify this with Air to Water heat pumps. Air to Air are quite capable of rapid heating for short periods of time in a...

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

@goody Its unusual for a heat pump to be undersized under the MCS protocols, its usually vastly the opposite. Cant you just swap it out for a bigger o...

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

@zoomuno You dont have to run it 24/7. I dont. However if you really only use the heating very sparingly then I think perhaps and air to air heat pump...

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

@goody I can only assume you had a terrible install? My heat pump is much cheaper to run than the gas combi I had previously and my house isnt very we...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Is it crucial to get flow temperatures with heat pumps right?

@alfapat So the problems you have are that your house has a large heat loss (Im assuming it is a big house), your system was designed to run at a h...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Is it crucial to get flow temperatures with heat pumps right?

@alfapat so buffer tanks act as a big roundabout for the water. Flow comes in from the heat pump and back and water goes to the heating circuit and ba...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
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