Help me keep the faith with my air source heat pump installation

AdamK · 2025-03-29T13:05:20Z

i knew when setting out on this road it would be a challenge i just didnt know how much of one it would be. after having many quotes some i couldnt fathom why they were so high i thought id sorted an installer. problem is they are 72miles away so first issue was doing a remote heat loss which has been back and forth several times to get it more or less correct, but still have one room thats 2m2 smaller than what i measured. anyway the next issue was getting the 28mm primaries in before the new kitchen ceiling goes in. they sent a plumber that proceeded to bugger the job up as the wall sleeve kit hadnt been supplied to him. so sent him on his way. was promised the sleeve kit the next day and i said my plumber could fit it to save them sending an engineer. next day no kit. add to this all the mods im having to do to pipe work to maximise efficiency and im seeing why the take up is tiny in the UK. im not naming the company as they are a recommended one and have apparently done good work else where but maybe thats in there local area. i know living in Boston creates its own issues being miles from any proper trades so if someone asked me would i recommend getting a heat pump in my area id have to say no. theres just not enough skilled trades where i live.

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Air Source Heat Pumps (ASHPs)

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JamesPa

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20/11/2025 6:10 pm

Posted by: @adamk

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@jamespa this is a graph with both flow and return on. seems to be keeping a 2.5c gap between them.

No cycling there except possibly at midnight on the first day.

Posted by: @adamk

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if im running effectively a higher curve it should lower the scop not keep it nearly the same.

You would expect so but don't forget cop varies with oat also. Also depends on how long you are averaging over. My 24 HR cop is now down to 3.4, but the 7 day cop is still 3.8. What's your 24hr cop as shown in the app? Your ft is a bit higher than mine so it may be a bit less.

This post was modified 1 hour ago 2 times by JamesPa

This post was modified 2 seconds ago by JamesPa

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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