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JamesPa
JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Oct 12, 2026
Profile Activity
Topics: 28 / Replies: 5490
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Reply
RE: Midea ASHP – how to set weather compensation

If I were in your shoes I would absolutely want to get an independent handle on loss based on actual measurement given that, from what you have said, ...

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat loss calculations and how they work in conjunction with heat pump sizing

There is some truth and perhaps even relevance in that! It sounds like just the sort of house for which the standard fabric calculation could eas...

12 months ago
Forum
Safety, Regulations, Tools, Plumbing & DIY Installations
Reply
RE: Heat loss calculations and how they work in conjunction with heat pump sizing

That depends on the circumstance and your assertion is not necessarily true. If for example if oversizing leads you to going from one heat pump to 2,...

12 months ago
Forum
Safety, Regulations, Tools, Plumbing & DIY Installations
Reply
RE: Heat loss calculations and how they work in conjunction with heat pump sizing

Sure, its a 200sq m 1930s house with (originally) solid walls, a couple of modest modern extensions and miscellaneous fabric upgrades such as partial ...

12 months ago
Forum
Safety, Regulations, Tools, Plumbing & DIY Installations
Reply
RE: Heat loss calculations and how they work in conjunction with heat pump sizing

  In 3 years on this forum I have seen very, very few cases indeed of under sizing of the type you are describing. In contrast there have b...

12 months ago
Forum
Safety, Regulations, Tools, Plumbing & DIY Installations
Reply
RE: Say hello and introduce yourself

Welcome. Do feel free to start a new thread about your installation with any questions. if you are at all unsure or anything looks or feels wrong wi...

12 months ago
Forum
Introductions, Forum Rules & Updates
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RE: Renewables & Heat Pumps in the News

Agree...but worse still is a human. Many hackers gain entry initially by exploiting the weakness of human beings. Eliminate those and we would be mu...

12 months ago
Forum
Renewables News
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RE: Heat loss calculations and how they work in conjunction with heat pump sizing

I'm not sure where you are getting your design information from, but its incorrect. The standard design temperatures, as specified in MIS3005(D), are...

12 months ago
Forum
Safety, Regulations, Tools, Plumbing & DIY Installations
Reply
RE: Heat loss calculations and how they work in conjunction with heat pump sizing

Doing the plot from heat pump output gives 6.5-7kW also. Depends on how cold house gets. Heat loss is dependent on house temperature Vs outside not...

12 months ago
Forum
Safety, Regulations, Tools, Plumbing & DIY Installations
Reply
RE: Radiator sizing for heat pump installation by British Gas - are these correct?

You are spot on. I don't know TBH as I don't have them, they weren't available when my heat pump was fitted. They look that way though!  

12 months ago
Forum
Air Source Heat Pumps (ASHPs)
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