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davidnolan22
@davidnolan22
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Reputable Member
Joined: Jan 15, 2025
Last seen: Nov 29, 2025
Topics: 0 / Replies: 134
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RE: Ecodan ASHP Low COP and Unstable Compressor Frequency

its a little odd that your UFH comes back warmer than the rads. normally the other way around. if they are all fully open, the water might be travell...

2 weeks ago
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RE: Ecodan ASHP Low COP and Unstable Compressor Frequency

Do you know your house heat loss? How many UFH loops you got? How many rads?

2 weeks ago
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RE: Ecodan ASHP Low COP and Unstable Compressor Frequency

  Here is my last 24hrs, its very stable and steady. its likely complex why yours is doing what it's doing and without knowing the set up, wi...

2 weeks ago
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RE: Ecodan ASHP Low COP and Unstable Compressor Frequency

that ASHP is working, from the looks of it, way too hard all day. I know you know this, but something is not right. where is the heat going?

2 weeks ago
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RE: UFH downstairs and radiators upstairs balancing question

@jamespa Hi, thanks for getting back to me. this week will be more interesting as its getting colder here is Sheffield. Can you explain the DT...

2 weeks ago
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RE: Heat Pumps Without Grants: Would You Have Installed One & Will You Now?

There is no way I would have installed heat pump without BUS. Even with BUS I wish I’d kept a gas boiler. When I put in my heat pump, boilers were ...

2 weeks ago
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RE: Renewables & Heat Pumps in the News

If the BUS goes, I see a lot of hest pump companies going bust. Im currently still trying to fix my install. Im now worried that if the BUS goes, the ...

2 weeks ago
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RE: UFH downstairs and radiators upstairs balancing question

@toodles   sorry, my bad. Its a 6 port LLH. of the 2 higher ones, the rad circuit is the lower of those 2.

3 weeks ago
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RE: UFH downstairs and radiators upstairs balancing question

@ashp-bobba Hi, thanks for reply. I've started to play, its still very warm outside so need it to get cooler, but I've closed 2 loops out of 9 w...

3 weeks ago
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RE: UFH downstairs and radiators upstairs balancing question

@ashp-bobba Can I pick you brain about mine 260m2 house. 2 x UFH manifold, one 150m2 manifold in new extension, one 50m2 in old gr...

4 weeks ago
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RE: UFH downstairs and radiators upstairs balancing question

@toodles   not yet. The UFH takes the slightly warmer flow due to its position on the low loss header.

4 weeks ago
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RE: UFH downstairs and radiators upstairs balancing question

This is a tricky one. I'm having the same problem. A poorly done heat pump design with UFH and rad split. Now running it all open zone and its very ...

4 weeks ago
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