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Last seen: Oct 1, 2025
There have been a few discussions dotted around (e.g. I think Urban Plumber had a video on YouTube) where the 8.4 kW is not accounting for defrosts, m...
@heatgeek an interesting eureka moment - would provide what certainly sounds like a plausible explanation for the pump arrangement. I will likely ...
@jamespa @heatgeek I'm unsure as to the exact pump in the outdoor unit, but under the impression it is PWM. Flow speed can be adjusted on the pane...
@heatgeek I think it's also worth chucking out into the conversation that there are different degrees of cycling. I have a 12 kW Vaillant, and at t...
@sicky and therein lies the greatest difficulty the simpler the spreadsheet the more assumptions it's making for you. It certainly sounds like you hav...
@benson certainly removes them as an option! Have sent them a carefully worded query so will see what I get back in writing ...
@benson @richard24738 was this flagged by directly contacting them? My policy is up for renewal and I was about to renew as I couldn't see any exclusi...
Turned the setting off on mine as couldn't find anything anywhere that explained what it did with respect to ASHP (only mentioned to do with gas boile...
@old_scientist I made the jump to cosy the other weekend after a few days of lousy solar and no sign of cheap (windy) rates on agile for the weekend i...
@johnmo I did consider asking if you had found overall heat demand / electric usage had increased when you had reduced the cycle time but increased ov...
@johnmo Once you have the heat meter readings going in then hopefully you should be able to get the fully interactive read out (same as the heatpumpm...
Forum Handle: Declan90 Manufacturer: Vaillant Model: Arotherm+ 12 kW Type: ASHP Arrangement: Mono (Double Fan) Area of Country: Leicesters...
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RE: Renewables & Heat Pumps in the News
@jeff hefty read… exhausted now, but will admit I skimm...
By Mars , 5 hours ago
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Grant Aerona R290 15.5kw Heat Pump
Does anyone have the Grant Aerona 15.5kw heat pump and ...
By willow345 , 6 hours ago
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RE: Grant 10kW versus Samsung 12kW - sizing dilemma with ECO4 installation
@tobyg - what has your experience been with the Grant 1...
By willow345 , 6 hours ago
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No corrosion inhibitors detected in system fluid. No fr...
By phowardstutterheim , 6 hours ago
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RE: Heat pump Surge protection
@transparent I do so appreciate your contribution on th...
By DavidAlgarve , 8 hours ago
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RE: Daikin high temperature heat pump
@gajolos I heard back from Daikin, and they explained t...
By Mars , 11 hours ago
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RE: Aerotherm 12+12kw cascade huge power utilisation
@editor This is really crazy. I can sort of understan...
By JamesPa , 19 hours ago
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Or just add any further discussion to the other thread....
By cathodeRay , 20 hours ago
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RE: NIBE Heat Pump Warranty: What's an Adequate Engineer Attendance Time?
@hughmark, great to hear. Fingers crossed that it’s sor...
By Mars , 1 day ago
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RE: Samsung Gen 7 16kW Integrated unit Modbus monitoring
@johnnyb HI,I have an integrated unit with all componen...
By antonical , 1 day ago
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RE: Solar Power Output – Let’s Compare Generation Figures
@papahuhu Ironical isn’t it? The last few days, the ‘Ag...
By Toodles , 1 day ago
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RE: Setback savings - fact or fiction?
I answered that days back, I even provided a summary of...
By RobS , 1 day ago
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RE: If a heat pump can only heat DHW to 50C then what? Issue with 18KW Heliotherm heat pump
I must say that this install is sounding more and more ...
By Mars , 2 days ago
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RE: Who's your electricity provider and what's your tariff?
@chandykris Thanks, that’s a fair point and I agree th...
By Eliuccio , 2 days ago
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RE: The law of unintended consequences....
Oh Thank you Major, I was just beginning to wonder wher...
By Toodles , 4 days ago
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RE: Forum updates, announcements & issues
I know that the notifications are being delivered now w...
By Mars , 4 days ago
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RE: Advice needed after a successful "leftfield" experiment.....
@pauli I have sent a direct message with the financial ...
By ChandyKris , 4 days ago
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RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!
Does it disappear when the heat pump is off? What abou...
By JamesPa , 4 days ago
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RE: Fitting heat pump plumbing and pipes in advance?
Great tips, thanks. The PEX/Al/PEX option sounds much m...
By Jonatan , 4 days ago
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RE: Struggling to get CoP above 3 with 6 kw Ecodan ASHP
Those control valves on the UFH manifold could be an is...
By Travellingwave , 4 days ago
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RE: Daikin Altherma 3 LT compressor longevity question
Up to a point yes. However every heat pump (and every ...
By JamesPa , 4 days ago
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RE: New Build ASHP Defects - Looking for Advice, Support & Shared Experiences
Is that a single pair only? If so it may be part if th...
By JamesPa , 4 days ago
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@batpred, you’re quite right; it does work well. I don’...
By Majordennisbloodnok , 4 days ago


