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Why are ASHP installs so expensive?

 
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Air Source Heat Pumps (ASHPs)
Last Post by Toodles 41 seconds ago
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Toodles
 Toodles
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18/09/2026 2:00 pm  

@majordennisbloodnok I must say that I was impressed when my installers started their work, at the huge trays of very shiny copper bends and other fittings that were there in front of them to use to make the best and neatest connections to all the elements of the system - all using the joints that are sealed with those motorised ‘jointing machine’ thingies. (Technical term there)😉 I dare say that there was no ‘put a few more joins in that pipe to make it impressive’ work going on but I can easily see why the ‘sundries’ costs are high! Regards, Toodles.


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


   
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Majordennisbloodnok
 Majordennisbloodnok
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18/09/2026 2:08 pm  

Posted by: @toodles
↑

@majordennisbloodnok I must say that I was impressed when my installers started their work, at the huge trays of very shiny copper bends and other fittings that were there in front of them to use to make the best and neatest connections to all the elements of the system - all using the joints that are sealed with those motorised ‘jointing machine’ thingies. (Technical term there)😉 I dare say that there was no ‘put a few more joins in that pipe to make it impressive’ work going on but I can easily see why the ‘sundries’ costs are high! Regards, Toodles.

Exactly. I don't have a problem with "sundries" being a big proportion; I would just want to know why and have evidence the scale was justified.

The point at which a quote lands with the customer, the business relationship is still only in its early stages. The customer has met the installer and got a feel for the installer's attitude but that's still a long way from being prepared to trust them. The quote is not only a list of items and a cost; it's also a document that helps the customer decide whether to believe in the installer or not. It's also the last point at which the customer can reasonably walk away if they're not satisfied, so it's no wonder the quote will be picked over in some detail.

 


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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JamesPa
 JamesPa
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18/09/2026 2:16 pm  

Posted by: @toodles
↑

all using the joints that are sealed with those motorised ‘jointing machine’ thingies. (Technical term there)😉

Have you seen the price of those pieces of kit!  


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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Toodles
 Toodles
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18/09/2026 2:26 pm  

@jamespa I think I can imagine, along with MCS fees, I suspect they are a major component in the overall running costs to installers.


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


   
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Toodles
 Toodles
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18/09/2026 2:38 pm  

@majordennisbloodnok Yes, that ‘Early days of a business relationship’ is very important. For this reason I have approached my ASHP installer about installing AC for us. I think that from the various quotes we received ‘last time round’, they are not going to be the cheapest - but I know them well now and I know the quality of their craftmanship and their support. These qualities are well worth paying for in my opinion! Regards, Toodles.


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


   
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