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JamesPa
@jamespa
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Illustrious Member
Joined: Apr 3, 2023
Last seen: Sep 14, 2025
Profile Activity
Topics: 17 / Replies: 2844
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Reply
RE: Heat loss calculators and spread sheets

I have done various thing, basically my approach was 'do a sensible and practical upgrade whenever a room is decorated or the opportunity arises'. Ov...

9 months ago
Forum
Safety, Regulations, Tools, Plumbing & DIY Installations
Reply
RE: Heat loss calculators and spread sheets

Assuming you actually heat the house (which, admittedly, it sounds like you may not fully) a gas consumption of 16kWh and a heat loss of 18kW are not ...

9 months ago
Forum
Safety, Regulations, Tools, Plumbing & DIY Installations
Reply
RE: Avoid the Heat Pump Villain: Why Low-Loss Headers and Buffers Can Sabotage Your Heat Pump's Efficiency

@mars - have you considered 'empty-chairing' the buffer tank advocate. It would send a very powerful message throughout the video without you having ...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Avoid the Heat Pump Villain: Why Low-Loss Headers and Buffers Can Sabotage Your Heat Pump's Efficiency

That's a shame as I was looking forward to the fireworks, but as you say it's a strong message which needs to be heard.

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Avoid the Heat Pump Villain: Why Low-Loss Headers and Buffers Can Sabotage Your Heat Pump's Efficiency

That will be fun!

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Avoid the Heat Pump Villain: Why Low-Loss Headers and Buffers Can Sabotage Your Heat Pump's Efficiency

Agree, and if there is a flow mismatch the question is 'why' and can it be eliminated using something without undesirable side effects. In most cases...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: MCS heat pump pre-sale information and performance calculation

Agree. I looked at daily vs OAT and peaks/distributions of 3, 6 and 12 hourly averages. The former gave me a figure, the latter (which were fairly s...

9 months ago
Forum
Government Schemes, Regulations, Planning & Organisations
Reply
RE: MCS heat pump pre-sale information and performance calculation

Yes, precisely that (at a specified outdoor temperature) A question I have been asking quite loudly (on this forum and elsewhere) for a year or m...

9 months ago
Forum
Government Schemes, Regulations, Planning & Organisations
Reply
RE: Avoid the Heat Pump Villain: Why Low-Loss Headers and Buffers Can Sabotage Your Heat Pump's Efficiency

I am referring to Occams razor in the sense of cutting out the unnecessary and I explain this in my post. If its unnecessary (in a particular applica...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: MCS heat pump pre-sale information and performance calculation

Whilst I totally agree that an accurate heat loss determination is absolutely essential (and have made many comments about how unsatisfactory the curr...

9 months ago
Forum
Government Schemes, Regulations, Planning & Organisations
Reply
RE: MCS heat pump pre-sale information and performance calculation

My reading is this: Its headed 'pre sale' and says its for use 'in conjunction with MIS 3005D.' MIS 3005D specifies that a heat load calculation m...

9 months ago
Forum
Government Schemes, Regulations, Planning & Organisations
Reply
RE: non-Mitsubishi owners - how much control do you have over your ASHP "freeze stat" function?

That all sounds plausible. Neither heat pump nor boiler manufacturers seem to be particularly precise about what these sort of functions do. The obj...

9 months ago
Forum
Air Source Heat Pumps (ASHPs)
Page 127 / 239
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