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How would you rate the design, installation and efficiency of your heat pump system? Poll is created on Nov 06, 2022

  
  
  
  
  
  

[Sticky] Rate the quality of your heat pump design and installation

 
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Air Source Heat Pumps (ASHPs)
Last Post by JamesPa 1 hour ago
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 Gmuzz
(@gmuzz)
Active Member Member
Joined: 3 months ago
Posts: 12
22/02/2026 10:32 am  

@jamespa trustpilot has a reasonable reputation of collecting good and bad reviews on the major installers.



   
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 Woofers64
(@woofers64)
New Member Member
Joined: 2 hours ago
Posts: 1
22/02/2026 11:01 am  

I came here to vote after watching Mars video on YouTube. Apologies if this has already been raised but I find the top category of ‘Flawless’ completely inappropriate. To many people it suggests a result which is effectively unachievable, I can’t think of anything in life that I would describe as flawless. I think something like ‘Excellent, met or exceeded all my expectations’ would be better, to me that’s a very different thing.

Having said that, I’d like to give a big recommendation to Custom Renewables who installed our ASHP system from Heat loss calculations to commissioning and handover. All very smooth and professional, the performance over the two years since installation have exceeded my expectations!



   
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JamesPa
 JamesPa
(@jamespa)
Illustrious Member Moderator
Joined: 3 years ago
Posts: 4305
22/02/2026 11:22 am  

Posted by: @gmuzz
↑

@jamespa trustpilot has a reasonable reputation of collecting good and bad reviews on the major installers.

Personally I don't trust Trustpilot following an occasion when I relied on it to select a roofer, a mistake that cost me £5000.  For this reason I wouldn't recommend it abut accept that others would.

As it happens I am happy with my own heat pump install, but I benefitted from the information here and a degree in physics, to help filter our the BS merchants (some of which, even following a 3 hr survey, wanted to instal a machine with twice the required capacity).  I must say though that, when I went through the exercise 2-3 years ago, I found at least as m any BS merchants as honest guys.  Hopefully that situation has now changed for the better.

 


4kW peak of solar PV since 2011; EV and a 1930s house which has been partially renovated to improve its efficiency. 7kW Vaillant heat pump.


   
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