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Last seen: Apr 21, 2026
@jamespa Thanks again for the great comparison. Yes, I certainly was not considering the 9kW one! And I did notice they had the units wrong on there (...
... the property was built in aprox 2020, about 170 sq M, ground floor plus two above, the top floor being essentially a pre-converted loft room, but ...
Wow, thanks for that @jamespa! I actually did 15.0 degrees for the degree day output, so can adjust slightly. I have a feeling that a calculated he...
Thanks @jamespa for showing the variability. Unfortunately for me taking a gas meter reading involves a trip outside the house! I did gather data over...
@editor Good work Mars!
Mythic Beasts are great!
Thanks @jamespa and @toodles. This company has done work for me before so I am pretty comfortable with them.
Ok... I did another one, still not using the DegreeDays concept, but using another snapshot. From 11:55pm on March 3rd to 8:55am on March 4th I used 2...
but an AI gives me a slightly different value (maybe due to Calor rounding that L x 7.1 figure): To calculate the kWh from 2.39 cubic meters...
Hi @bobtskutter ! Thanks for your reply -- I'll have to take some time to digest it, some new concepts in there for me. The kWh figure I arrived at th...
according to degreedays.net, that 16th date (at Gatwick observation station) was about 14.3 heating degree days for the 15.5 base temperature. The 21s...
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RE: Vaillant arotherm plus heat pump frost protection
@jamespa Just watching a video on You Tube of a heating...
By seoras , 7 hours ago
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RE: Renewables & Heat Pumps in the News
The real question is, was there ever a committed intent...
By JamesPa , 8 hours ago
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RE: Brown Oily Residue Blocking Air Vent and Weeping Relief Valve... Anyone Seen This?
Difficult to comment further without being there. If...
By JamesPa , 11 hours ago
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@andrewj A ‘DIY’ job suggests you may clean up quite we...
By Toodles , 13 hours ago
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RE: Our 10 year old Grant heat pump failed
Back in the 70’s and through the eighties, one of my re...
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RE: Indevolt Batteries UK Support & Info Thread
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RE: Share Your Experiences with Heat Pump Manufacturer Support
@seoras Sorry to hear that. I found Vaillant very help...
By JamesPa , 1 day ago
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The Watchdog That Watched and Waited
On 9 January 2026, Consumer Energy Solutions collapsed ...
By Mars , 1 day ago
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RE: GSHP Kaput After 16 Years: New Compressor or Switch to ASHP? Advice Welcome
Cool Energy in Grimsby sell ground source heat pumps an...
By DerekDeLeon , 1 day ago
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RE: Valliant Heat Pump Settings
Thats arguably a sign of a good installer - they unders...
By JamesPa , 1 day ago
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RE: Electricity price predictions
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By Batpred , 1 day ago
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RE: Two heating zones to one zone
@profzarkov They arent obviously wrong, but the only...
By JamesPa , 2 days ago
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RE: Towns water feed to air source heat pump system
The DHW circuit cant be separated (well it could, you c...
By JamesPa , 2 days ago
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Solis AC-coupled 3kW storage inverter
Solis AC-coupled 3kW storage inverterPylontech batterie...
By MartinRobinson , 2 days ago
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RE: My NIBE ASHP Nightmare: No Commissioning, High Bills and a Hostile Installer
As @transparent has observed above, this is not bad, an...
By cathodeRay , 2 days ago
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As I was reading this article Mars, I was thinking that...
By Toodles , 3 days ago
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RE: Tell us about your Solar (PV) setup
Installed in May 2011: 16*Sharp 245 W monocrystalline p...
By txmartyn , 3 days ago
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RE: Say hello and introduce yourself
That doesn't sound 'right' to me. The national Smart ...
By Transparent , 4 days ago
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RE: Growatt battery disconnected
I doubt this will happen, but I will try and suggest it...
By Eliuccio , 4 days ago
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Understood. That's why I decided from the outset on a ...
By JamesPa , 4 days ago
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RE: My experience with 3 heat pump surveys: Heat Geek, British Gas & Octopus
On the litigation, I would not go there and definitely ...
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RE: Recommended home battery inverters + regulatory matters - help requested
I suppose if your pv inverter packs up, you have a plan...
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