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bontwoody
bontwoody
@bontwoody
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Joined: Mar 5, 2022
Last seen: Dec 16, 2025
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Topics: 35 / Replies: 921
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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...

11 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...

11 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...

11 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...

11 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...

11 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...

11 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...

11 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...

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

@alfapat OK. thanks for the information. It looks like your system was designed to run at 50C when at -4C outside. The yearly electricity use for s...

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

@alfapat Sorry, missed the (large) tank comment 🙂 OK if the original install was for 25 kW then the 16 kW alone probably isnt oversized, but it su...

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

@alfapat Thats the document! unfortunately I cant read it from the images, they are probably compressed for the forum. I will pm you my email address,...

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

@alfapat So you should have been given the heat loss calculation when you had the heat pump installed. It has to be done by the installer. I think t...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
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