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JulianC
JulianC
@julianc
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Noble Member
Joined: Mar 8, 2021
Last seen: Sep 1, 2025
Profile Activity
Topics: 6 / Replies: 326
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Reply
RE: Potential questions to ask installers.

Thanks Derek, always reliable information from you. So a hydro box is different from a split system. I’ve a split Daikin system with the fan, heat exc...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP retrofit to 1970s semi

Hi Kuba I think it’s all about getting several quotes and approaches. 8mm pipes are small to the radiators, but do they run all the way back to the ...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Air source heat pump performance

Wow Jet, that is a large kW usage. A few questions as you property is a similar size to mine. And I have a HT ASHP. What was the original MCS heat req...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Potential questions to ask installers.

Phil, by small bore pipes to the radiators, in my case I mean 10mm. We have large “mains” pipes running in the loft that are 35mm or 28mm with 10mm dr...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Potential questions to ask installers.

Evening Phil. Get several quotes. They will need to do a heat loss and heat demand calculation. Your dimensions and oil usage were similar to my bunga...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Air source heat pump performance

DanT - we have 4kW of solar PV - we generate about 3700kWh per year - as you say much more in the summer. My system is 9 years old (see detailed desc...

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

Welcome Phil. Top tip is to speak to several ASHP installers to get a variety of views. Unless it’s the size of Blenheim Place, a 2005 built home shou...

4 years ago
Forum
Introductions, Forum Rules & Updates
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RE: Air source heat pump performance

DanT you definitely need to get a diverter. You look like a “data man”, so perhaps the Solic is not for you, but I can certainly recommend it.

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Air source heat pump performance

Morning Dan T You are collecting a lot more data than I am. But I think your plan to only heat when needed is sound. Else the ASHP only heats a bit,...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Air source heat pump performance

That’s a whole lot of expansion vessels - 3? I’ve got one for the Mixergy tank. And the Daikin has an internal one

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Another should I or shouldn't I.

Good spot Kev M. Aj, what is the room by room heat demand / loss calculation? As Kev M says, changing every radiator is surprising. Can you do work t...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Another should I or shouldn't I.

So early days for me aj. According to my installer, 10mm micro bore are ok if your main system/loft pipes are at least 28mm. Ideally 35mm. Mine are. O...

4 years ago
Forum
Air Source Heat Pumps (ASHPs)
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