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HughF
@hughf
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Noble Member
Joined: May 2, 2022
Last seen: May 5, 2025
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Topics: 6 / Replies: 482
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RE: 17kw Grant Aerona heat pump not performing

It’s a grant, it will be badly installed, in an inefficient manner. The Chofu unit that Grant re-badge is decent and is made in Japan, Grant just choo...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Mitsubishi ecodan 11kW ridiculously expensive running costs. Help!

48,000 kWh of gas into an 80% efficient boiler would give you 38,400 kWh of heat. An ecodan running at a SCOP (note the seasonal bit there) of 3.25 ...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Grant aerona 3 Weather compensation parameters

Attached is the Chofu user manual for your heat pump. It might be helpful.

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Massive Electricity Cost

The only difference between the mideas is the fan and compressor speed…. Run both faster, get more heat out.

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Oil vs Gas vs ASHP costs.

I do the same maths weekly when trying to tell people how the maths adds up…. My gas boiler is 72% efficient so my break even cop is something ludic...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Grant aerona 3 Weather compensation parameters

You need to set your weather compensation to something reasonable. I’d go for 47@-3 and 37@15 Turn the nest up to something high like 30 and leave i...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Our ASHP is costing £24 a day to run

sounds like the installer was anything but great then if they didn’t bother to show you how to operate the system efficiently. Any old plumbing monkey...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Our ASHP is costing £24 a day to run

That’s a good looking heatpump and one of the only ones I’ve seen with a separate call for heat Input for dhw and space heating. you need to ensure...

3 years ago
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Air Source Heat Pumps (ASHPs)
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RE: Our ASHP is costing £24 a day to run

Good job it isn't this cold all year round then... Remember, it's only this expensive for the next three months, then it's uphill from there.

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Massive Electricity Cost

@batalto All I know is: " FHP Cloud - Exclusive to Freedom Heat Pumps and Midea! FHP Cloud is a browser-based dashboard you can use to a...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Massive Electricity Cost

The other available option for more accurate (possibly?) monitoring with Midea units is FHP Cloud...

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Massive Electricity Cost

Yep, Glyn did a good job of that install. He followed the Midsummer wholesale wiring instructions and has a PWM controlled primary pump.

3 years ago
Forum
Air Source Heat Pumps (ASHPs)
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