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bontwoody
bontwoody
@bontwoody
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Noble Member
Joined: Mar 5, 2022
Last seen: Jul 11, 2025
Profile Activity
Topics: 29 / Replies: 807
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RE: Is it crucial to get flow temperatures with heat pumps right?

@toodles Thanks, thats actually more than I expected so quite useful.

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

@alfapat So this is the lockshield valve Sometimes they have knurled knobs on which can be used to adjust them, but if not then just use a smal...

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

@alfapat Sorry, I didnt see the temperature readings. So you are losing about 4C by using the buffer which I think is about an 8% loss in efficiency. ...

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

@alfapat some installers try and set up the heat pump to run like a conventional boiler with TRVs. It’s an incredibly expensive way of doing it but ea...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Battery sizing - How low can you go!

Yes thats right, although I dont totally use all my battery capacity and its closer to 4.5 kWh charging rather than 5kWh per night I think what Im s...

6 months ago
Forum
Energy Storage
Reply
RE: Is it crucial to get flow temperatures with heat pumps right?

@alfapat Hi Pat, sorry Ive been away for a few days so havent had a chance to catch up. Im not sure you are doing the radiator valves correctly. The...

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

@alfapat I will be interested to see how the flow and return from the buffer compares with that of the heat pump.

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
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...

6 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 😁

6 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.

6 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...

6 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...

6 months ago
Forum
Air Source Heat Pumps (ASHPs)
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