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Old_Scientist
@old_scientist
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Joined: Jun 16, 2024
Last seen: Aug 18, 2025
Profile Activity
Topics: 5 / Replies: 199
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RE: Determining correct flow rate?

I don't I'm afraid - you could try looking up the specs of the Grundfos pumps online. My own system uses fixed flow rate Wilo pumps, with 3 differen...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Determining correct flow rate?

Have a look at John Cantor's excellent online calculators here (specifically the flow rate calculator): Heat (kW) = Flowrate (Litres/sec.) x 4.2 ...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat pump monitoring - what are you using?

@njt As the Cosy peak rate (4-7pm) immediately follows a cheap slot, your battery should be fully charged and at least should avoid importing during t...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: COP or Cost Per kWh

Where I think COP is immensely useful is in giving a snapshot, either instantaneous or over time, of a system's performance, which can be useful in co...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat pump monitoring - what are you using?

Hi @declan90 We are in an almost identical situation to you (except I'm staying on Agile for now). ASHP installed in June, so this will be our first...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat pump monitoring - what are you using?

@bontwoody Thanks, that's the one and for other Samsung owners who may be interested I found loads more info here:

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat pump monitoring - what are you using?

Following this thread with much interest. @cathoderay I have a Samsung Gen6. I have an independent electricity meter showing ASHP usage. The numb...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat pump install overloads home fuse - 80A limitations

@njtt Great news that you've had it back approved. I found the DNO (NG in my case) were more than reasonable and very helpful.

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Who's your electricity provider and what's your tariff?

Natural gas (or LNG), widely used in the production of electricity in Europe and the UK, isn't a product of crude oil, so the pricing of the two are i...

12 months ago
Forum
Electricity, Tariffs, Monitoring & Providers
Reply
RE: Heat pump install overloads home fuse - 80A limitations

At least your installer flagged it as an issue before the installation. My ECO4 installer never bothered to inform the DNO that they'd installed a 12k...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: The Pros and Cons of an oversized heat pump

Yes, I've not had a chance to really play with settings yet as we've not experienced a winter, but because I assume I'd be cycling (of some descriptio...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: The Pros and Cons of an oversized heat pump

@johnmo, I'd taken it from John Cantor's video here, see the slide from ecoforest towards the end of the video at 20:08min which shows efficien...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
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