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What a Bad Heat Pump Installation Looks Like

 
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Air Source Heat Pumps (ASHPs)
Last Post by idemportent 3 months ago
41 Posts
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cathodeRay
 cathodeRay
(@cathoderay)
Famed Member Moderator
Joined: 4 years ago
Posts: 2895
09/12/2025 12:08 pm  

Posted by: @jamespa
↑

The two paragraphs can co-exist, and by recognising this we deal with reality rather than fantasy.

Completely agree as well. As geriatricians are wont to say, we must hope for the best, but be prepared for the worst.

Posted by: @grantmethestrength
↑

the ammunition used for the General Purpose Machine Gun

Ah, got it now, I hadn't thought that laterally. I had in mind something simpler, but still effective (modified image from here):

 

image

Midea 14kW (for now...) ASHP heating both building and DHW


   
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Majordennisbloodnok
 Majordennisbloodnok
(@majordennisbloodnok)
Famed Member Moderator
Joined: 4 years ago
Posts: 1765
09/12/2025 4:43 pm  

Ah, yes. Clint wanted a new cowboy outfit, so looked to MCS for help.

 


This post was modified 3 months ago by Mars

105 m2 bungalow in South East England
Mitsubishi Ecodan 8.5 kW air source heat pump
18 x 360W solar panels
1 x 6 kW GroWatt battery and SPH5000 inverter
1 x Myenergi Zappi
1 x VW ID3
Raised beds for home-grown veg and chickens for eggs

"Semper in excretia; sumus solum profundum variat"


   
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cathodeRay
 cathodeRay
(@cathoderay)
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Joined: 4 years ago
Posts: 2895
09/12/2025 6:16 pm  

Posted by: @majordennisbloodnok
↑

Ah, yes. Clint wanted a new cowboy outfit, so looked to MCS for help.

Very good!


Midea 14kW (for now...) ASHP heating both building and DHW


   
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Batpred
 Batpred
(@batpred)
Prominent Member Member
Joined: 1 year ago
Posts: 823
09/12/2025 6:35 pm  

Posted by: @majordennisbloodnok
↑

Posted by: @cathoderay
↑

Ah, got it now, I hadn't thought that laterally. I had in mind something simpler, but still effective (modified image from here):

 

image

Ah, yes. Clint wanted a new cowboy outfit, so looked to MCS for help.

Spot on, for relatively little money, an air of ready "reg" approval gives a new life to the lonely ranger..

 

 

 


This post was modified 5 months ago by Batpred

8kW Solis S6-EH1P8K-L-PLUS hybrid inverter; G99: 8kw export; 16kWh Seplos Fogstar battery; Ohme Home Pro EV charger; 100Amp head, HA lab on mini PC


   
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MikeFl
 MikeFl
(@mikefl)
Estimable Member Member
Joined: 3 years ago
Posts: 132
12/12/2025 12:36 am  

@editor The trick to an inside unit installation is to put it in someone else's house 😉


Grant Aerona 3 10kW


   
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 Madscientist
(@madscientist)
New Member Member
Joined: 4 months ago
Posts: 2
21/01/2026 11:29 am  

Please have a look at the video in this BBC article

https://www.bbc.co.uk/news/articles/ckgj7me00p0o

They have enclosed the heat pump in a box and wonder why it's inefficient and costing them load of money.   I don't know who added the box but anyone servicing the unit should flag this major issue.  Unbelievable. 



   
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Mars
 Mars
(@editor)
Illustrious Member Admin
Joined: 5 years ago
Posts: 4550
Topic starter 21/01/2026 12:55 pm  

@madscientist wow! I despair. 

Screenshot 2026 01 21 at 11.53.27

Get a copy of The Ultimate Guide to Heat Pumps

Subscribe and follow our YouTube channel!


   
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 Madscientist
(@madscientist)
New Member Member
Joined: 4 months ago
Posts: 2
21/01/2026 1:03 pm  

Indeed.  My feeling exactly



   
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 Tim441
(@tim441)
Honorable Member Contributor
Joined: 4 years ago
Posts: 398
21/01/2026 2:51 pm  

Whats the chances they're running on fixed flow and not weather compensation?


Listed Grade 2 building with large modern extension.
LG Therma V 16kw ASHP
Underfloor heating + Rads
8kw pv solar
3 x 8.2kw GivEnergy batteries
1 x GivEnergy Gen1 hybrid 5.0kw inverter
Manual changeover EPS
MG4 EV


   
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Toodles
 Toodles
(@toodles)
Famed Member Contributor
Joined: 4 years ago
Posts: 2727
21/01/2026 3:03 pm  

@tim441 With all radiators having the LSV’s wide open and TRV’s on all of ‘em.


Toodles, heats his home with cold draughts and cooks food with magnets.


   
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Mars
 Mars
(@editor)
Illustrious Member Admin
Joined: 5 years ago
Posts: 4550
Topic starter 21/01/2026 3:35 pm  

Posted by: @tim441
↑

Whats the chances they're running on fixed flow and not weather compensation?

It's unbelievable how many emails and DMs I've received this winter from homeowners that have been left on fixed flow temps. 

 


Get a copy of The Ultimate Guide to Heat Pumps

Subscribe and follow our YouTube channel!


   
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 idemportent
(@idemportent)
New Member Member
Joined: 4 months ago
Posts: 3
07/02/2026 4:02 pm  

When a disused pub building behind my property was converted into 4 flats recently, I was pleased to see that the developers installed heat pumps rather than gas.

However the way they enclosed the outdoor units really shocked me. Is this the worst possible outdoor install?

20260207 135657


   
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