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HarriUp
@harriup
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Joined: Nov 25, 2021
Last seen: Jun 28, 2025
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Topics: 1 / Replies: 107
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RE: Ecodan - flow rates, sensors, settings

The manual is quite explicit that it is set for the flow meter supplied ... and the Sika sensor says it only measures up to 80l/min - but if you look ...

12 months ago
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Air Source Heat Pumps (ASHPs)
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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 ...

1 year ago
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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...

1 year ago
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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...

1 year ago
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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...

1 year ago
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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...

1 year ago
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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...

1 year ago
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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...

1 year ago
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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 ...

1 year ago
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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...

1 year ago
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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 ...

1 year ago
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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
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Air Source Heat Pumps (ASHPs)
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