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JamesPa

@jamespa

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Illustrious Member

Joined: Apr 3, 2023
Last seen: Nov 14, 2025

Topics: 18 / Replies: 3373

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RE: In the Bleak Midwinter... Midea heat pump performance, poor COP and windchill in action

If this is the case then its a bit weird its not enough particularly as you presumably have a primary that is pretty low resistance (or is it?). So t...

12 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: In the Bleak Midwinter... Midea heat pump performance, poor COP and windchill in action

Im not an expert on pump curves (or indeed very much else) however there is a good guide to reading pump curves here/p> I think the way to look ...

12 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: In the Bleak Midwinter... Midea heat pump performance, poor COP and windchill in action

They decide is by measuring the flow/return temperature. The control loop adjusts the output of the heat pump (within the limits it can achieve) to g...

12 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: In the Bleak Midwinter...

Fascinating. Referring to your first post, is it a cycle or a defrost. It looks like the latter but maybe Im misreading. Can you confirm Understa...

12 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: 1meter boundary planning question about heat pumps

Planning officers tend to be black and white in their approach in my experience so minor or not it's a breach. In practice it almost certainly hangs...

12 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Don’t ‘TRV’ (Trust a Radiator Valve!)

Thats odd. I have experienced a (Drayton TRV4) which is stuck open because a plastic insert inside the head about 4mm dia and 2mm thick had somehow f...

12 months ago

Forum

Thermostats, Volumisers, Buffer Tanks, TRVs, Pumps, Piping, Valves, Radiators & Controls

RE: Should We Rethink the Name “Heat Pump” for Homeowners?

Cue the 'ignore climate change and it might go away' lobby running articles telling their readers that heat pumps have been cynically rebranded by the...

12 months ago

Forum

Well & Truly Off The Grid

RE: Ecodan help - flow temperature spikes when operating in weather compensation mode

The peaks in your graph (which I presume are the 'spikes' you are referring to) appear to be at different FTs. What is the set FT, what is the set FT...

12 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: 1meter boundary planning question about heat pumps

Its a good thought however - my interpretation is: The physical installation falls within the legal definition of 'development' (and thus requires...

12 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Ecodan help - flow temperature spikes when operating in weather compensation mode

Is it spiking or is it gradually reaching the required FT following a defrost. You can tell it is going into defrost mode (which is expected given cu...

12 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: 1m Boundary planning question

Correct Whoa! The change has been announced this week but the rule is still in place until the law changes (which it is said will be next year b...

12 months ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Government announces removal of planning permission rules for ASHPs

Indeed, it's scaremongering. The same outlet also ran a headline predicting civil unrest as a result of the changes.

12 months ago

Forum