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Last seen: Aug 5, 2026
@ashp-bobba wow that is such a professional approach. I am really impressed!
Yes, I agree with your points. However, the risks are different in nature. If you oversize a heat pump, then the risk is that it is less efficient. ...
@batpred I suspect there is probably a heat pump owner maturity curve. People start by trying to get the last 5% efficiency out of the system. The...
@jamespa I am really impressed that your heat loss estimate was so accurate. May I ask what kind of house you live in? In winter, when we had the g...
@jamespa yes, I agree it doesn’t need to be perfectly accurate - only enough to ensure you size the system to a reasonable level. Do you now have fir...
@Fiona obviously redact any sensitive information.
@Fiona I am really sorry to hear about your awful situation. There are few things worse than being really cold in your own home. As @jamespa has su...
@agentgeorge Back to the Future with the flux capacitor!!
@jamespa unfortunately, I don't think heat loss calculations can ever be terribly accurate. Our house was built in 1968 and has a real hotchpotch of ...
Assuming the heat loss figures are accurate, the radiator sizings look sensible. We have Flow Regulating Valves (FRVs) installed on almost all our ra...
@editor I am all in favour of provocative titles that make people pay attention. However, we also need to be careful. These shows ar...
@editor Mars, it is really great that you have set up this forum for discussion and learning. Unfortunately, we always learn more from our mistakes t...
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Degrees of Separation
Latest Posts
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RE: How Accurate Is My DIY Heat Loss Calculation?
@editor Thanks Mars, I have been enjoying playing with ...
By kilgorexv , 2 hours ago
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New Vaillant Arotherm controls link to existing thermostats ; wired vs wireless
I am feeling baffled and worried:We are having a an Aro...
By GutoFfowc , 5 hours ago
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RE: Do I add Air Con or MVHR to existing A2W ASHP?
@rob-of-york Thank you, I’m thinking along these same l...
By Toodles , 8 hours ago
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@Mars Good questions! The downstairs unit did the maj...
By Rob of York , 8 hours ago
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RE: Questions about A2A for heating as well as cooling
@donciccio I would suggest that you take a "fabric-fi...
By Rob of York , 9 hours ago
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RE: Volumisers in Heat Pump Systems: Does Placement Matter?
@dave, I think @jamespa has probably identified the mos...
By Mars , 1 day ago
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RE: Plug and play solar. Thoughts?
My thought is simple. Bring it on and bring on plug in...
By JamesPa , 2 days ago
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RE: Heat Geek mini store vs pump size
Yes I agree, that’s why Heat Geek have most likely sele...
By Tomtheheatingengineer , 2 days ago
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RE: Who's your electricity provider and what's your tariff?
@chandykris Swings and Roundabouts, you win some…. ...
By Toodles , 2 days ago
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@tomtheheatingengineer, thank you, and welcome to the f...
By Mars , 3 days ago
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RE: HeatGeek vs Octopus surveys: puzzling disparity - any ideas why?
@majordennisbloodnok @tomtheheatingengineer For my ...
By JamesPa , 3 days ago
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RE: Is the "divide by 2900" rule still valid?
Really flow rate is a pipework limitation not a water p...
By JamesPa , 3 days ago
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RE: The good, the bad and the not that great – my heat pump installation
@burtis, I’ve followed this thread pretty much from the...
By Mars , 6 days ago
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