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Prunus
@prunus
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Joined: Apr 6, 2021
Last seen: Oct 16, 2026
Profile Activity
Topics: 6 / Replies: 77
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RE: Hybrid oil and ashp experiences please

Oops, missed the edit window. It's section 8.4 on page 120 (External Heat Source) not 8.3 (electric backup heater) - it appears you can have both and ...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Hybrid oil and ashp experiences please

For Grant the heatpumps are made by Chofu who provide a much more detailed manual. See section 8.3, page 111 onwards: In particular, 8.3.2 describe...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Media bias towards to air source heat pumps

The interviewer sounds like she wants to be Jeremy Paxman, interrupting and not letting the interviewees speak. But that seems to be her style - list...

5 years ago
Forum
Well & Truly Off The Grid
Topic
Share your electricity bills
5 years ago
Forum
Air Source Heat Pumps (ASHPs)
Replies: 32
Views: 13849
Reply
RE: Noisy Grant Aerona 3 13kW ASHP question

Hi Cally We’ve had a 13kW Grant installed about a month now, and it was really noisy to begin with. It came from the pipes, although the outdoor...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Specific questions about heat pumps

Question from me: What are the risks of oversizing an ASHP, and are there ways they can be mitigated? For example, might minimum flow rate be a prob...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP manufactures (NIBE vs Grant)

I did look at RED - Freedom Heatpumps have some videos on them. I'm a bit wary about this 'designed for the UK climate' thing: I've seen that slogan...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Two interesting hydrogen graphics

I came across this video: This is the perspective of, shall we call them, 'Big Boiler'. They take the position that they can build hydrogen boil...

5 years ago
Forum
Well & Truly Off The Grid
Reply
RE: Please don't shout at me! Electric boiler vs ASHP

It's also worth mentioning that heating in flats is a bit different from houses, because in flats you often have a lot of walls and floors that are he...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP manufactures (NIBE vs Grant)

Interestingly, I think I figured out that Grant are rebrands of Chofu of Japan - the diagrams in the installation manuals are identical. I'm not fami...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Lay person looking from the outside in

Hi Mark, if you already have a plumbing background I can recommend the training videos from Freedom Heatpumps: Most of what they describe are Monobl...

5 years ago
Forum
Introductions, Forum Rules & Updates
Reply
RE: ASHP manufactures (NIBE vs Grant)

I too am wondering this question - in this case Grant v Mitsubishi. The installer says Grant 'is the better product' which could be installerspeak fo...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
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