Last seen: Apr 30, 2025
@robs Thanks for this. The statement about 8C was not mine. It came from a Brendon quote. The flow rate shown is the current one. Are you saying that...
@heacol I am sorry that this provoked such a reaction. Misinformation applies to me as well so I did warn you. I never made any definitive statements...
@jamespa @heacol Beware disinformation on this forum. I took some time out to verify the statement made about all the top performing heat pumps on...
@jamespa For the sake of clarity, in my previous response I ignored the house heat requirement at 15C OAT for a 10kW load at design temperature. The ...
@jamespa So, it seems that we have an empirical answer to your question rather than an engineering one. Therefore, from this input and context, I ded...
@jamespa You should best address this question to Brendon. I would also be keen for more clarification as it is fairly fundamental. I am not an insta...
@jamespa For a fixed pump in question on open loop, dT could be <2C at 15C. Below is another view on the topic with which I concur.
@jamespa Let me throw my hat into the ring on this one. If one accepts that a delta-T of 5C is required for correct operation of a heat pump, then he...
@jamespa @RobS. You are missing the point here. Part L states that EVERY room should have a thermostat to control the heat output. Practically then, i...
@RobS Don’t understand the logic here. If a thermostat shuts off a zone, its flow stops therefore the overall flow is reduced i.e. flow varies with st...
@ubert767 You may find this useful as well.
@ubert767 File is attached. My explanation may be a bit unclear. My HP only turns off when all stats turn off, otherwise the flow modulates above ...
Latest Posts
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RE: Renewables & Heat Pumps in the News
Lol... thanks to @judith I cracked and gave the Spanish...
By Lucia , 1 hour ago
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@editor I had my second ‘Annual Service’ carried out by...
By Toodles , 3 hours ago
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RE: Getting the best out of a heat pump - is Homely a possible answer?
@grahaml I cannot agree that it is a small percentage o...
By benson , 15 hours ago
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RE: Warm weather and heat pumps.
You’re welcome @lucia - thanks for watching. I’ve alway...
By Mars , 17 hours ago
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RE: Commencing on an ASHP Installation Process
In that case treating it as a separate space seems emin...
By JamesPa , 22 hours ago
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For me, the Questions are here: 1) Does a Volumiser t...
By iantelescope , 1 day ago
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RE: Yes, the "zoning with ASHP" topic again...
This aspect of control is a bit variable from manufactu...
By JamesPa , 1 day ago
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RE: Samsung Gen6 16kW tribulations
@emceed, can you please give us an update on your syste...
By Mars , 2 days ago
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RE: ASHP Ecodan L9 error - No Heating but Hot Water
@phoenix15 Sorry to hear that, we are all the way down ...
By ASHP-BOBBA , 2 days ago
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RE: Solar Power Output – Let’s Compare Generation Figures
@editor Well last MAY i know was not the greatest for s...
By Andris , 3 days ago
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What's the problem you are trying to solve. The answer...
By JamesPa , 4 days ago
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Good luck. For what it is worth my system was very def...
By JamesPa , 4 days ago
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RE: Massive Electricity Cost for Running My Air Source Heat Pump
I agree @mark-h The Building Regs are now very readable...
By Transparent , 5 days ago
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RE: Help me understand my Mitsubishi Ecodan system
@carpenterstation When changing settings in the ser...
By RobS , 5 days ago
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RE: Ecodan Legionella cycle - immersion heater problem
Thanks for letting us know @clockworks I admire your ...
By Transparent , 6 days ago
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RE: Revised version of MCS-020 (noise standards for heat pumps)
As you say this is no change, which I personally think ...
By JamesPa , 6 days ago
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RE: What happens when the outside temperature exceeds the upper WC point?
@editor not via the WC curve but as @old_scientist ment...
By bontwoody , 6 days ago
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RE: MHHS and Heat Pump compatibility
@toodles to be clear I don't know if there will be a re...
By Scalextrix , 7 days ago
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I did not know this concept, although others might. I...
By Morgan , 1 week ago
