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Ground source heat pump is unaffordable to run

 
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Ground Source Heat Pump (GSHPs)
Last Post by Mars 2 years ago
34 Posts
7 Users
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 GSHPwoes
(@gshpwoes)
Active Member Member
Joined: 3 years ago
Posts: 17
Topic starter 26/01/2024 1:18 pm  

@hughf I don’t think the immersion is on?

IMG 2623


   
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 HughF
(@hughf)
Honorable Member Member
Joined: 4 years ago
Posts: 489
26/01/2024 1:31 pm  

@gshpwoes you can cancel the legionella program for a start. Total waste of time, unless you’re 85 and immunocompromised.


Off grid on the isle of purbeck
2.4kW solar, 15kWh Seplos Mason, Outback power systems 3kW inverter/charger, solid fuel heating with air/air for shoulder months, 10 acres of heathland/woods.

My wife’s house: 1946 3 bed end of terrace in Somerset, ASHP with rads + UFH, triple glazed, retrofit IWI in troublesome rooms, small rear extension.


   
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 HughF
(@hughf)
Honorable Member Member
Joined: 4 years ago
Posts: 489
26/01/2024 1:49 pm  

Posted by: @gshpwoes
↑

@hughf I don’t think the immersion is on?

-- Attachment is not available --

It certainly appears that way…. Although having your gshp on a c50 seems somewhat excessive. However, I expect it’s because it isn’t an inverter machine, a lot of older gshp weren’t. With that come quite a sharp startup surge when the compressor fires up.

Do you know the model number of the unit, the design flow temperature, and the heat loss calcs for the property?

 


Off grid on the isle of purbeck
2.4kW solar, 15kWh Seplos Mason, Outback power systems 3kW inverter/charger, solid fuel heating with air/air for shoulder months, 10 acres of heathland/woods.

My wife’s house: 1946 3 bed end of terrace in Somerset, ASHP with rads + UFH, triple glazed, retrofit IWI in troublesome rooms, small rear extension.


   
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Mars
 Mars
(@editor)
Illustrious Member Admin
Joined: 5 years ago
Posts: 4792
26/01/2024 3:56 pm  

@gshpwoes, which part of the country are you in?


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Rewritten and updated for 2027
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🛠️ Bodge Buster
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 GSHPwoes
(@gshpwoes)
Active Member Member
Joined: 3 years ago
Posts: 17
Topic starter 26/01/2024 4:00 pm  

@editor south east scotland



   
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 BU
(@heacol)
Prominent Member Contributor
Joined: 5 years ago
Posts: 415
28/01/2024 3:43 pm  

@gshpwoes Unfortunately, from looking at the pictures, and the components used, you more than likely have a serious flow issue.



   
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 GSHPwoes
(@gshpwoes)
Active Member Member
Joined: 3 years ago
Posts: 17
Topic starter 28/01/2024 3:58 pm  

@heacol can I do anything about this?? 🤞



   
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 GSHPwoes
(@gshpwoes)
Active Member Member
Joined: 3 years ago
Posts: 17
Topic starter 29/01/2024 5:59 pm  

@heacol hoping you can advise if this is a fixable problem and if it is, how..? 🤞



   
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Mars
 Mars
(@editor)
Illustrious Member Admin
Joined: 5 years ago
Posts: 4792
03/02/2024 11:09 pm  

@gshpwoes I received the following reply from the Heat Pump Federation directly relating to your case: 

As the machine is nearly ten years old, it probably doesn't have very good Internet connectivity for remote diagnosis. If the homeowner wants to email the Federation with whatever design materials they have, we'll see what can be inferred, before sending someone along and incurring that sort of cost. For example, with the postcode, we could review the EPC (Scottish equivalent) and the geology, to get a feel for system sizing. The fact that the radiators are cold in parts suggests a balancing problem. That could be dealt with by a competent heating technician/engineer because distribution problems are common to all technologies to a large extent. So they could find a good local central heating provider to look at that bit of the system.

Apart from that, have you made any progress with your system?


New to heat pumps? Take the Heat Pump Fundamentals course and use INTRO50 at checkout for 50% off.
Rewritten and updated for 2027
📘 From Zero to Heat Pump Hero
🛠️ Bodge Buster
🎧 Prefer to listen? Heat Pumps Explained – use AUDIO50 at checkout for 50% off.


   
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Mars
 Mars
(@editor)
Illustrious Member Admin
Joined: 5 years ago
Posts: 4792
26/02/2024 9:48 am  

@gshpwoes did you ever resolve your issues above?


New to heat pumps? Take the Heat Pump Fundamentals course and use INTRO50 at checkout for 50% off.
Rewritten and updated for 2027
📘 From Zero to Heat Pump Hero
🛠️ Bodge Buster
🎧 Prefer to listen? Heat Pumps Explained – use AUDIO50 at checkout for 50% off.


   
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