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Last seen: Mar 16, 2026
@editor I see. I knew there would be sound reasons. My ASHP is barely big enough, and I've seen aveage room temperatures drop a couple of degrees over...
Thanks @Mars. A 'boiler' you say, this is blasphemy!
Hi @editor, has the valve failed or the motorised actuator?
Hi @crimson, I think field 2 is compressor discharge temperature, field 0 is return water temp, 9 is leaving water temp. Check the Grant installation ...
Yes, this! Thermal mass is key. Ancient civilisations knew a thing or two about using solar reflecting lighter buildings, natural ventilation for cool...
@pie_eater I don't know the Daikin Madoka product, but having had a quick look on-line, it seems it's a simple binary [digital on/off] thermostat comp...
Great to know you've made good progress @martyj76, and ruled the pump out. The two port valve could well be faulty, it might be a fault with the valve...
@pie_eater different manufacturers have differing accuracies of COP data, some are just considering the refrigeration compressor, some are total unit ...
Beware the OEM COP 'vanity data' - most if not all heat pump controllers give very flattering [for flattering read exaggerated] COP data. True measure...
With the ASHP installed in a neighbouring street it's going to struggle with heat loss & hydraulic resistance. Clearly no-one had done any proper ...
Hi there @bajj, you've cracked it I think with setting parameter 21 41 to 2degC. UFH will have a very slow hysteresis response as the mass of the floo...
This is strange @martyj76, if the unit was installed by a Grant G1 installer, and has been annually serviced by a Grant G1 service engineer, it will b...
Latest Posts
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RE: End-of-Life Heat Pumps: How Do You Dispose of an ASHP in the UK?
Every manufacture has a guide and service list...
By ASHP-BOBBA , 7 minutes ago
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RE: Summer usage. Why is my Vaillant Aerotherm using so much energy on "heating"?
I don’t know how the Aerotherm works so can’t comment o...
By AndrewJ , 24 minutes ago
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Its good kit the Midea and significantly cheaper, you w...
By ASHP-BOBBA , 2 hours ago
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RE: Indevolt Batteries UK Support & Info Thread
Have you tried cutting the grid feed to see what actual...
By JamesPa , 2 hours ago
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Contractors pack for inta antifreeze valves are around ...
By ASHP-BOBBA , 2 hours ago
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RE: Renewables & Heat Pumps in the News
Critics and naysayers will be negative whatever the gov...
By JamesPa , 2 hours ago
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RE: Microbore heat pump installs
In principle you are almost certainly right, but in pra...
By JamesPa , 13 hours ago
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RE: Electricity price predictions
@old_scientist We are a low mileage home, so bulk of ou...
By ChandyKris , 14 hours ago
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There are just too many unknowns for me to comment on p...
By Transparent , 16 hours ago
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RE: What is the main ‘dictator’ of Agile’s unit price?
@toodles I keep an eye on wholesale prices and energy m...
By ChandyKris , 16 hours ago
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RE: Brand and installer questions for ASHP
Strange, perhaps it doesnt use modbus which the third p...
By JamesPa , 18 hours ago
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RE: Upgrading my system, how far do I go?
For comparison, my PW3 with 11.04kW inverter, will char...
By Old_Scientist , 21 hours ago
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RE: Changes to Tesla Powerwall Charging Regime?
Elon gate - legendary! I take my hat off to you @toodle...
By Old_Scientist , 1 day ago
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RE: Mitsubishi Ecodan not good enough ?
Thanks @goody, appreciate the feedback and sorry you ha...
By marcexec , 2 days ago
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RE: Minimum and Zero Disrupt Heat Pump Installations
True (first sentence) Thats the reason to consider th...
By JamesPa , 2 days ago
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RE: High air source heat pump running costs – Vaillant AroTherm Plus
Quite right. I was using a rough guesstimate of doublin...
By Majordennisbloodnok , 2 days ago
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RE: My Grant R290 9kW Heat Pump Installation
Again, really don't know how accurate this is! &nb...
By petch , 2 days ago
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RE: MCS Quality Audit – Has Anyone Had One? Did It Lead to Remediation?
@toodles The whole scheme is a shocking waste of money....
By Papahuhu , 3 days ago
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RE: Anyone concerned about GivEnergy?
Many thanks for your, and the subsequent, answers tk qu...
By KevH , 3 days ago
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RE: DIY or Don’t Touch? Solarman Smart Meter Install
Yes, and these guys would probably be my preferred inst...
By Batpred , 3 days ago
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RE: Hot water tank lose heat rapidly on random days
@jamespa Hopefully their reasons are well intended! ...
By Bash , 3 days ago
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RE: Ecoflow UK Support & Info Thread
As mentioned above, we’ve got our full review of the Ec...
By Mars , 3 days ago
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RE: Say hello and introduce yourself
@sonosppp welcome to the forums. I see you've posted in...
By Mars , 4 days ago
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RE: Guidance with installing a new heating system
@bobflux Great, thanks for the advice. The pipe has an ...
By Hamilton , 4 days ago
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RE: Daikin Altherma 3 LT compressor longevity question
@optimistic-optimiser I have has a Daikin for a few yea...
By madsid , 5 days ago
