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Last seen: May 29, 2025
Well said, Sir! I have been trying to get this point across to reluctant ears. SCOP measures the efficiency of energy use during ACTIVE heat pump peri...
@johnmo Agree entirely.
@johnmo Agreed on size of buffer tank. They also say that the flow of secondary pump must be higher than primary, therefore they are proposing a kind...
@damon Whilst we are waxing lyrical about Viessmann as a pinnacle of heat pump system design, attached is an extract from their manual. They state tha...
Really. This is a rather sweeping generalisation. This may be valid in an old house with 2 sqm window and radiator, but different issues apply in a mo...
@harryrea I agree entirely with the concept of zoning for practical purposes, especially for control of comfort. For example, I have a log burner in ...
This could be mitigated by putting a one way check valve on the top input so that flow is only downwards. Can't think of any detrimental effects.
Apologies. Poor choice of words. Delete "dilution of temperature to emitters is minimised".
Only the difference in flow between the heat pump and the emitters passes through the tank. This lower flow helps to preserve the stratification of th...
Note a key point here though. The primary pump is connected in the return pipe while the secondary pump is connected in the flow pipe after the buffer...
@potatoman No, the installation is exactly the same as a 4 port buffer with primary and secondary pumps except that the output flow bypasses the top ...
@ashp-bobba I am afraid that you are talking to the wrong person about manufacturers preferences. However, as far as I can see, it functions the same...
Latest Posts
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The UFH system was installed at the same time as the GS...
By phowardstutterheim , 13 minutes ago
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RE: Heat pump Surge protection
@transparent Many thanks for the advice and I will cert...
By DavidAlgarve , 27 minutes 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 , 7 hours ago
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Or just add any further discussion to the other thread....
By cathodeRay , 7 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 , 18 hours ago
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RE: Daikin high temperature heat pump
I’ll check in with Daikin to see if they can help answe...
By Mars , 18 hours 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 , 20 hours 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 , 22 hours ago
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RE: Setback savings - fact or fiction?
I answered that days back, I even provided a summary of...
By RobS , 22 hours 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 , 1 day 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 , 3 days ago
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RE: Forum updates, announcements & issues
I know that the notifications are being delivered now w...
By Mars , 3 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 , 3 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 , 3 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 , 3 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 , 3 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
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RE: Ecodan Cylinder Possible Weeping Around Thermostat Port
Update: Mitsubishi sent an engineer around. It was li...
By Gruff2001 , 4 days ago
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RE: A Smarter Smart Controller from Homely?
@benson Agreed. I believe the COP gains with homely, i...
By Papahuhu , 4 days ago
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How to Find All Your Posts and Topics on the Forum – A Quick Guide
If you’ve ever posted something on the forum and then s...
By Mars , 4 days ago
