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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: 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...

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

I think @technogeek is looking at a Vaillant which does, I believe, present a figure for the 'free' heat generated by the pump, so the 'paid-for' inpu...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Question about Ecodan's Room Autoadapt mode

If you really were getting a COP of 6 in Feb using WC mode then I'd be wondering if there is any benefit to changing to AA mode if it proves to be les...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Installing a heat pump in a Grade II listed property

Heat loss surveys are always going to be guesswork – even more so when you don't have evaluated materials and construction methods. Heat loss via air ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Creative trials on Night-time Setbacks to @ faster recovery, improved comfort and even greater energy reductions.

@sunandair The Ecodans just do not have a meter-grade electricity monitoring capacity. There is an over-estimation of the daily consumption that is...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan - optimal external installation?

I think this notion of an 'optimal' install is something of a chimera. Every installation is different, and the majority of forum users have experienc...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Why are my estimated delivered energy values so much lower than my consumed? (Mitsubishi Ecodan)

The last picture is the flow meter, the other two are of the tank thermistor in its pocket. The flow and return thermistors should be on the main pipe...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Why are my estimated delivered energy values so much lower than my consumed? (Mitsubishi Ecodan)

I would look first at the placement of the thermistor measuring the flow temperature. I am going to assume you have an Ecodan cyclinder too, in which ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Temperature schedule for ASHP

Your house loses heat 24hrs a day – if you heat the house for only some of those hours then you have to replace the lost heat as well, which if you ha...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: How are Ecodan CoP quotes from MelCloud setups?

The surplus consumption appears even when the heating is off over the summer, sometimes weirdly high, ie 3kWh - and though there is proportional relat...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: How are Ecodan CoP quotes from MelCloud setups?

@davidalgarve My surplus power 'consumed' last year was around 630kWh, so around 1.75kWh every day. Some fairly random variation either side of this...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Ecodan ASHP - How to optimise my set up?

@jaket I think the flat bottom to the return temp shows how the slab temperature is preventing anymore heat being dropped from the circulation in t...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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