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JamesPa
JamesPa
@jamespa
Moderator
Illustrious Member
Joined: Apr 3, 2023
Last seen: Oct 23, 2026
Profile Activity
Topics: 28 / Replies: 5526
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Reply
RE: MCS 2.0 - Changes in January 2025

Sorry I got to 1min 14 seconds and gave up. Disorganised, self indulgent, amateur cr*p up to that point, nothing to encourage me to listen to another...

2 years ago
Forum
Government Schemes, Regulations, Training, Planning & Organisations
Reply
RE: ÀSHP heat loss - how close to perfect can we get?

It matters. Averaged over a sufficient time period what you say is absolutely true - its the first law of Thermodynamics! However you were apparen...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ÀSHP heat loss - how close to perfect can we get?

Agreed According to your profile you have an ashp, presumably operating weather compensation. This being the case I would expect a much better corr...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Business case for a battery?

Yes sorry £1 per day is what I meant. 1K per kWh is a figure I have seen quoted more than once for a 'professional' install. £160 per kWh changes t...

2 years ago
Forum
Energy Storage
Topic
Business case for a battery?
2 years ago
Forum
Energy Storage
Replies: 42
Views: 13194
Reply
RE: ÀSHP heat loss - how close to perfect can we get?

Emissivity certainly comes into it but is not strictly the whole story - because radiators aren't predominantly radiators, they are predominantly conv...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ÀSHP heat loss - how close to perfect can we get?

Yes with reservations. If the house cools materially during the 'off' period then the average IAT will be lower than the 'target' IAT and so the amou...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ÀSHP heat loss - how close to perfect can we get?

No. The amount of heat lost/gained by conduction/convection will be dependent on the surface roughness and the nature of the medium in which it is im...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ÀSHP heat loss - how close to perfect can we get?

@judith , @larry , @cathoderay Collecting the above together with my comments and those from @cathoderay A room by room fabric spreadshe...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ÀSHP heat loss - how close to perfect can we get?

Im not entirely sure what this comment is intended to convey. My analysis is as follows - there are various ways of getting at essentially t...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ÀSHP heat loss - how close to perfect can we get?

It is this averaged over 24hrs. The reason I think that the daily averaging is useful is that it distinguishes days when its cold all day from iso...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: ÀSHP heat loss - how close to perfect can we get?

try/p> If you have a smart meter you have, or at worse your energy supplier has, half hourly gas meter readings. That's pretty close to energy i...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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