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Kev M
@kev-m
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Joined: Mar 5, 2021
Last seen: Jan 8, 2025
Profile Activity
Topics: 10 / Replies: 1266
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RE: Simplified systems – 2x7Kwh Valliant ASHPs

@sapper117 sounds good. Cheaper, warmer and most importantly a happy partner. Our wood and coal burners are now also nice to haves rather than th...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: 14kW Midea ASHP in an old leaky building

@cathoderay Do the Midea capacity figures include an allowance for defrosts? Mitsubishi's data includes this for its 2 deg C figures. In that link...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: 14kW Midea ASHP in an old leaky building

@cathoderay What I was getting at is that if your ASHP were performing according to the Midea specs then it would be close to meeting your requirem...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Fine tuning your ASHP performance

@markc Good results and looks like you made the right decision. Even allowing for the warmer November you're still using a lot less power. I did t...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: 14kW Midea ASHP in an old leaky building

@cathoderay are you sure it's an ASHP capacity problem? From what you say it can heat to a LWT of 46 C and has a RWT of 39C;that sounds reasonable...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Ecodan Room Temperature Mode

I just set my stats to 30 degrees if I want to take them out the loop. That way they are always calling for heat leaving weather compensation to do i...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Ecodan Room Temperature Mode

Alec, I know; I have monitoring and can see exactly how much energy the ASHP uses minute by minute. I'm just doing some experiments where I'm tryi...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Ecodan Room Temperature Mode

Very timely question. I've already 'proved' (subject to the caveats @derek-m mentions) that weather compensation only uses less energy than a fixed f...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Ice Energy Step Controller Settings

I think your flow temps look reasonable for ufh. Unless there is a fault, it would be very unlikely for an Ecodan to return a SCOP of close to 1. ...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Undersized ASHPs & Unbelievable energy bills

@robl thanks, I think I totally misunderstood what a heat exchanger/PHE was. I think I do now. We don't have one and it seems to be fine without ...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Undersized ASHPs & Unbelievable energy bills

I'm not sure I understand; are you saying if you have a PHE then water out is 5 deg less (or even 22 deg less) than water in? Where does all that ene...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
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