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Last seen: Mar 7, 2026
@derek-m I 2nd that and keep it slow and agonising for cavity wall insulation sharks. 🤬
@bontwoody Theirs (from your link) is even lower than the MCS calcs. HG = 3kw BG = 3.5kw Oct =4.? These are all estimated ...
@gunboatdiplomat I haven't done a Heat Geek calc but have done a de Podesta calc on 1year's metered gas use (which HG reckon is ok). This gave me 5.61...
@bontwoody yes, I understand about larger rads and lower flow temperatures what I don't grasp (and that page doesn't explain because I don't see any m...
@dougmlancs Thank you - that's definitely worth a try. I know the loft insulation was done in 2006 and the firm went bankrupt (my GBIS assessor found ...
@johnmo You have to extract everything first and only then can you refill it. Even for a small bungalow like mine it's £3,000 at least. I can't afford...
@toodles No, it can't be topped up.
@johnmo You have a 6kw Daikin? Good point about the bucket... My preference if going for the 6kw is to try and convince Octopus to accept it. I ...
Help! 😵💫 I now have 2 MCS calcs @ 45º flow temp how do I plot a compromise between the two? 1: Fully insulated cavity wal...
@jancold I was told by sales it would be a long wait but it came through pretty quickly. I only waited about 3 weeks. Install is proposed for Octob...
@judith did you see the link I posted yesterday in my 2 choices thread 'my new toy' ? It's worth checking for Daikin - you can set up the pump model &...
@jancold BG's quote for me is over £1000 higher than Octopus - without counting that Octopus will remove my gas connection and cap it off for free and...
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Latest Posts
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RE: How Accurate Is My DIY Heat Loss Calculation?
Any idea how efficient your gas boiler is? Is it a 50 y...
By Old_Scientist , 3 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 , 15 hours 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 , 1 day 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 , 2 days ago
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RE: HeatGeek vs Octopus surveys: puzzling disparity - any ideas why?
@majordennisbloodnok @tomtheheatingengineer For my ...
By JamesPa , 2 days ago
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RE: Do I add Air Con or MVHR to existing A2W ASHP?
There is scope for product development here. I for one...
By JamesPa , 2 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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RE: Starting Our Heat Pump Journey: 1962 build 3 bed detached house
First time poster here but I can share my experience as...
By SCH , 6 days ago
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RE: Is it the house or the equipment?
...which, I've found out, is pretty much impossible to ...
By Majordennisbloodnok , 6 days ago



