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HarriUp
@harriup
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Joined: Nov 25, 2021
Last seen: Feb 24, 2025
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Topics: 1 / Replies: 106
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RE: Creative trials on Night-time Setbacks to @ faster recovery, improved comfort and even greater energy reductions.

I have a meter on the dedicated HP circuit, so I know exactly what the HP is consuming. It is that that enables me to make the comparison with values ...

11 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Observations on my Ecodan's estimates of energy consumed and delivered

As it is possible for the FTC to be powered from a separate circuit, should this be the case none of its power draw, including the pumps, will be meas...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Observations on my Ecodan's estimates of energy consumed and delivered

I think Occam should get his razor out on this one. The simplest explanation is that the Mitsubishi is not capable of accurately measuring the electri...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Gas Combi to ASHP - Making sense of survey results and proposal.

@jeh in relation to your house I can see why you suggest 13000kWh is a lot, but it is around the average heat requirement for the UK, and the avera...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Gas Combi to ASHP - Making sense of survey results and proposal.

An annual gas use figure of 13000kWh, as long as you are close to keeping the entire property at 20° for most of the time, would suggest a 5kW ASHP wo...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: New ASHP system - choices

All heat pumps will hit the point where their minimum output exceeds the heat being taken out by the heating circuit, not oversizing too much means th...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Gas Combi to ASHP - Making sense of survey results and proposal.

The output of radiators running at 35° is around half that at 45° – so your radiators would have to be twice the size! And you can't really drop the f...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Gas Combi to ASHP - Making sense of survey results and proposal.

I posted on another thread which may of some relevance - – I had a similar gas use figure and a similar heat loss figure which with the data from the ...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: New ASHP system - choices

@mattc The heat loss was done for a temperature of -2.5°C and produced a figure of 7.31kWh for heat loss. That would work out at 175kWh for a day a...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: New ASHP system - choices

You would think/hope that energy used in heating a building would be an ideal benchmark to build a system round, but unfortunately it doesn’t seem to ...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: My ASHP is not performing as well as I’d hoped: COP just over 2

@hcas - exactly so. I did read one other persons similar experience but the overshoot was lower if I recall correctly. I can only make this comparison...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: My ASHP is not performing as well as I’d hoped: COP just over 2

@toodles All those factors might result in a lot more heat being required, it can still be delivered in a very efficient way. Lack of efficiency seems...

1 year ago
Forum
Air Source Heat Pumps (ASHPs)
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