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JamesPa
JamesPa
@jamespa
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Joined: Apr 3, 2023
Last seen: Oct 8, 2026
Profile Activity
Topics: 27 / Replies: 5464
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Reply
RE: Midea ASHP – how to set weather compensation

Er, it does. It knows the heat loss because it knows LWT, RWT and flow rate. Thats the heat supplied which, if the house is in equilibrium, must equ...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Any thoughts on control strategies for heat pumps?

I find it quite challenging to think about, to say the least. The simple model of a house, which we use much of the time, is a monolithic block cha...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Rate the quality of your heat pump design and installation

That's not necessary so far as I can see. Measuring the current weather tells the heat pump or boiler whats currently happening to the outside of hou...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Any thoughts on control strategies for heat pumps?

If you only ever want them at 18C then it would be better simply to turn down the lockshields on these rads. Then you retain the full active system v...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Cosy 12 or Grant Aerona 15.5?

What cylinder do you currently have? There are very likely installers who wont insist on replacing it (eg Heat Geek 'Zero disrupt') BTW I used to t...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Cosy 12 or Grant Aerona 15.5?

There is onl,y one system currently on heatpumpmonitor that is both under 200 sq m and have a measured heat demand of >9kW at the design temperatur...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Cosy 12 or Grant Aerona 15.5?

@glacken With 3 years on this forum, I am immediately suspicious whenever I read a surveyed heat loss greater than about 9kW, unless its for a mansi...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Any thoughts on control strategies for heat pumps?

There is essentially no doubt that operating heat pumps on well adjusted weather compensation, is, in the vast majority of cases, the way to go. In s...

7 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Domestic wind turbines

For a couple of years b&q sold one, but then stopped I presume because no demand. They are quite popular for narrowboats see eg/p>  

8 months ago
Forum
Wind Generation
Reply
RE: Cosy 12 or Grant Aerona 15.5?

That's a big or rather lossy house. How certain are you that this is correct. Do you have any existing consumption figures to act as a sanity check,...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat Pump Books For Beginners – The Ultimate Guide to Heat Pumps, Bodge Buster & From Zero To Heat Pump Hero

If you are prepared to take out a buffer/LLH (or replumb it as a volumiser) and disable third party controls (which is generally possible with appropr...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
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