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Prunus
@prunus
Member
Estimable Member
Joined: Apr 6, 2021
Last seen: May 26, 2026
Profile Activity
Topics: 5 / Replies: 70
AllTopicsReplies
Reply
RE: Anyone want to share costs on batteries?

The folks over at diysolarforum.com are getting quotes for $1300-1800 (delivered, variously to US, EU, etc) for ~10kWh of LiFePO4 cells from China, de...

5 years ago
Forum
Energy Storage
Reply
RE: Smart TRV’s in Cabinets?

I'm not aware of smart TRVs with external temp sensors, but one possibly useful thing is that UFH setups typically have the valve and the temperature ...

5 years ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Chilled Water AC System

I think what you're talking about are Fan Coil Units or FCUs. They're basically a pipe with metal fins to transfer the heat, with a fan to blow air t...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: What is this and what does it do?

I'm not sure that difference is 'set', but it's essentially the properties of your heat emitters (radiators, UFH etc) and water cylinder. For exampl...

5 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
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: 12018
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
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