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robl
@robl
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Honorable Member
Joined: Mar 23, 2022
Last seen: Jul 30, 2025
Profile Activity
Topics: 1 / Replies: 203
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Reply
RE: What do we need to know before installing a heat pump?

[quote data-userid="5190" data-postid="19305" A volumiser in the primary, together with a good insulation of the PHX to reduce delta T to around 1C m...

2 years ago
Forum
Government Schemes, Regulations, Planning & Organisations
Reply
RE: What do we need to know before installing a heat pump?

@cathoderay With regard to the cycling:Exactly what controls do you have? I understand you have a manufacturers weather compensation system, and T...

2 years ago
Forum
Government Schemes, Regulations, Planning & Organisations
Reply
RE: What do we need to know before installing a heat pump?

A few ideas to consider: The ashp is outside - no doubt it's measuring produced power at the unit, so will include any pipe losses that the oil boil...

2 years ago
Forum
Government Schemes, Regulations, Planning & Organisations
Reply
RE: DIY Heat Pumps.

"Natural" gas is effectively an unlimited supply of highly flammable material - and so is super dangerous! Our R290 gshp is outside (tick!) and use...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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RE: Say hello and introduce yourself

The heat exchanger material conductivity is actually a compromise. Through the material, the thin way, we want high conductivity. Along the material...

2 years ago
Forum
Introductions, Forum Rules & Updates
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RE: Say hello and introduce yourself

@gutoffowc Plastic heat exchangers are usually used inside MVHR units. For an air:air heatexchanger, there's not that much heat transfer needed ac...

2 years ago
Forum
Introductions, Forum Rules & Updates
Reply
RE: Rethinking the mindset for mass retrofit - a provocative idea

@iancalderbank I'd love to see MID certified meters installed under MCS, and then a guaranteed SCOP performance from it! I appreciate the meters c...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Rethinking the mindset for mass retrofit - a provocative idea

The blog on this forum compares installed SCOP to manufacturers datasheets, giving overall average of 2.7:

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Rethinking the mindset for mass retrofit - a provocative idea

I think that the price ratio of Electicity to Gas is largely responsible for the UK's reluctance to embrace heatpumps. I understand that it will come...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Say hello and introduce yourself

@gutoffowc It sounds like it needs more than recalibrating. Perhaps the original installers? We have a vent axia sentinel kinetic BH plus, it ha...

2 years ago
Forum
Introductions, Forum Rules & Updates
Reply
RE: Turning your heat pump off

Here’s an example of a mid certified meter- if you have a spare slot in your consumer unit, it’s an easy install for a sparky, split core so just clip...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: 10.5kW unit that needs a new compressor

The compressor is brazed to copper pipes - brazing is basically much higher temperature soldering, joining copper pipes together with a dissimilar met...

2 years ago
Forum
Grounds Source Heat Pump (GSHPs)
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