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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Aug 19, 2025
Profile Activity
Topics: 17 / Replies: 2696
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RE: Help me understand my Mitsubishi Ecodan system

Hi Just to confirm my understanding. You have an 11kW heat pump and an assessed loss of roughly 2.5kW (118W/K * 20). Is this a correct interp...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Help me understand my Mitsubishi Ecodan system

Thanks. Just a few more questions to get a handle on sizing What was the date of the plot and what was the approx OAT then? Which model ASHP...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Help me understand my Mitsubishi Ecodan system

Fundamentally I agree with @mars and yes please post the full system schematic for detailed suggestions. Seriously heat pumps work best when operate...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Avoid the Heat Pump Villain: Why Low-Loss Headers and Buffers Can Sabotage Your Heat Pump's Efficiency

Thats a brilliant result and you must be pleased you persisted with fighting this. Its also a good example of what I am beginning to suspect (but can...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Revised version of MCS-020 (noise standards for heat pumps)

As you say this is no change, which I personally think is reasonable given the figures in BS 8233.

4 months ago
Forum
Government Schemes, Regulations, Planning & Organisations
Topic
Revised version of MCS-020 (noise standards for heat pumps)
4 months ago
Forum
Government Schemes, Regulations, Planning & Organisations
Replies: 2
Views: 387
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RE: why solar diverters for HW instead of the heat pump?

I should probably add to my comments above that, whilst I can definitely see an argument for using a solar diverter in some cases - most particularly ...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: why solar diverters for HW instead of the heat pump?

The argument I can think of is that solar diverters precisely match the power draw to the available excess solar power, which heat pumps cannot do. T...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Commencing on an ASHP Installation Process

Lots of reading and questioning which the background makes easier. I started when I first thought about getting a heat pump for myself and it became ...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Commencing on an ASHP Installation Process

Crudely dividing by somewhere between 2000 and 2900 gives an estimate dependant on assumptions/who you believe. My total gas consumption for a 7kW ho...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Commencing on an ASHP Installation Process

11kW does sound way over in that case! As you say it will be interesting to see what others come up with, maybe try to get a copy of the calculations...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Commencing on an ASHP Installation Process

Is 116 sqm both floors, or just the footprint? If the former then 11kW sounds possibly a bit high to me. Your conservatory may be dominating however...

4 months ago
Forum
Air Source Heat Pumps (ASHPs)
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