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alistairgbarron
@alistairgbarron
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Trusted Member
143 kWhs
Joined: Dec 3, 2022
Last seen: Dec 18, 2022
Profile Activity
Topics: 1 / Replies: 24
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RE: ASHP Retrofit in a 2015 house with 10mm radiator tails

@cathoderay Problem at the moment IMHO is that there are precious few good installers and too many double glazing salesmen. And they must be MCS cert...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: ASHP Retrofit in a 2015 house with 10mm radiator tails

@derek-m Perhaps it’s me, now I have had a play with your spreadsheet, but if I reduce the DeltaT water temp to 30C the output falls off a cliff to 21...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: ASHP Retrofit in a 2015 house with 10mm radiator tails

@derek-m thx for that. I’ll apply those equations to my radiator table. Meanwhile just putting in my total radiator output and my heat loss gives me a...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP Retrofit in a 2015 house with 10mm radiator tails

@cathoderay the kitchen and lounge have 2 rads but 1 heat loss and all the numbers stack up. I have 2 spreadsheets for heat loss so I am making sure...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: ASHP Retrofit in a 2015 house with 10mm radiator tails

@derek-m I'll look at the data and get a representation and yes - its a WB 42CDi so 92%

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP Retrofit in a 2015 house with 10mm radiator tails

@cathoderay so I have done as you suggest. Heat Loss Q with a DeltaT of 30C (-5C to 25C) my whole envelope heat loss came to 5400w and room by room ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP Retrofit in a 2015 house with 10mm radiator tails

@derek-m EDF installed smart meters a year ago so I could do just that. Despite revisits the gas meter never worked and apparently won't until they co...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP Retrofit in a 2015 house with 10mm radiator tails

@cathoderay thx, I'll give that a go later - could be interesting.

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: ASHP Retrofit in a 2015 house with 10mm radiator tails

@transparent you want weather data? I can give 3 years of history and real time from a Davis VP+ station data and graphs e.g.. Solar thermal isn't...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Say hello and introduce yourself

@julianc Hi, our boiler temp has always been set at around 50C and it heats the house just fine. It only goes above that if there has been HW demand.

2 years ago
Forum
Introductions, Forum Rules & Updates
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RE: Say hello and introduce yourself

@transparent - Thx. I have just made a detailed post to the ASHP section here. I do have a recent EPC but of course that tells you nothing. I did a ...

2 years ago
Forum
Introductions, Forum Rules & Updates
Topic
ASHP Retrofit in a 2015 house with 10mm radiator tails
2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Replies: 45
Views: 7318
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