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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Sep 13, 2025
Profile Activity
Topics: 17 / Replies: 2840
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Reply
RE: How much radiator capacity do I need for an air source heat pump?

10kW is based on the design FT of 45. Most of the upstairs emitters are rather 'oversized' (for FT45) because I upgraded them before I realised quite...

8 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Controversial opinions - pure weather compensation, buffer tank, heat loss, oversized heat pumps

Thats a fair observation, although some of the 'cheaper' brands (eg Samsung) with very basic controllers seem to have caught up in price certainly wit...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Controversial opinions - pure weather compensation, buffer tank, heat loss, oversized heat pumps

No, (if society survives that long which, given out bent for self destruction must be questionable). Its my personal conviction that ToU tariffs wi...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: New 5kW Samsung Gen6 heat pump owner with loads of questions

@technogeek The majority of the population probably do have condensing boilers but, sadly, the majority are set up not to condense (flow temperatur...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Controversial opinions - pure weather compensation, buffer tank, heat loss, oversized heat pumps

I agree that just because its decades old is not a good reason, but the point is that it is decades old and has been proven to work. Its also not j...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Controversial opinions - pure weather compensation, buffer tank, heat loss, oversized heat pumps

Thanks for these, you make some good points (at least in my opinion), here are some comments from me Im not sure they are a waste of time becaus...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Is My Midea Heat Pump Inherently Defective?

Interesting. I currently run in 'low noise' mode at night and I find that mine overshoots in both 'normal' cycling and defrost but not when 'low no...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Defrost behaviours

I think we commented on this briefly earlier and I agree. I also think it might be more or less inherent with our climate and the 3:1 (or in realit...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Is My Midea Heat Pump Inherently Defective?

This is an interesting one which had faintly crossed my mind. Does any heat pump do this. I have heard that there are some which have an auxiliary...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: How much radiator capacity do I need for an air source heat pump?

I will concede that the first sentence was blunt and for that I apologise if offence was caused. It was intended to be succinct (surely a good thing)...

8 months ago
Forum
Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls
Reply
RE: Defrost behaviours

Thats a brilliant plot with a full range of temperatures. Your 'no cycle' window is clearly shown as about 8C-5C. The cycles even only just above 8C...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ASHP on a low income: a cautionary tale

I 100% agree that this needs tackling and understanding. I have seen very little analysis of the economics of part time heating with either fossil f...

8 months ago
Forum
Air Source Heat Pumps (ASHPs)
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