Last seen: Oct 29, 2025
Refrigerant efficiency is quoted in absolute terms with reference to the refrigerant properties. There are many more variables that determine the over...
Welcome @biagg from a fellow Grant 10kW Aerona owner. The key with the Aerona is to have all radiators and thermostats constantly calling for heat a...
Great news @crimson on the primary flow. Get well soon in what hopefully is a warmer house. I need to research that LLH to see what internals could im...
All pipework on CH and DHW side in plant room that can get warm, flow and return, even expansion vessel connections, should be insulated. heat lost an...
Thanks @crimson, buried primary piping looks a proper product, probably Isoflow or similar. Good. Primary flow must be fixed #1 priority. Clean stra...
@crimson good morning. Lots of people here want this one fixed for you! What's the approximate length of buried pipework on the primary circuit under ...
Hi @crimson, sure. The formula is the sensible heat equation, to work out how much heat energy in kJ/s is being added. 9 is your flow rate as indica...
@crimson great stuff. The delta T between flow and return is high, especially when your ASHP is on low load, 1300W power consumption, that's about 1/3...
@Crimson, I hesitate to state it, but it seems like your plumbers are clueless. You need a fresh pair of eyes on the job as there's something seriousl...
Finally Grant is waking up and smelling the coffee and, when they offer their 'smart controller' option pack (which monitors primary flow rate), they ...
Hi @crimson, probably time to bite the bullet and get the system checked over by Grant. The installation manual from Grant has suggested circuits for ...
Some progress on the hot water. Reducing the flow on the secondary side to balance with the deficient flow on the primary side is a sticking plaster. ...
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RE: Are We Sleepwalking Into Another Race to the Bottom?
Isn't that the job of a robust interviewer?
By JamesPa , 2 minutes ago
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RE: Grant 13kW Aerona3 - issues getting zones to temp
And just when I think great they’re coming next week to...
By Crimson , 14 minutes ago
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RE: Mitsubishi Ecodan R290 10kW performance
For the benefit of the discussion I am going to repeat ...
By JamesPa , 51 minutes ago
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RE: Very Much Awake – Renewing the Heating Industry One Step at a Time
I feel that that attitude shared by Aadil from Heat Gee...
By Toodles , 1 hour ago
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Back to this as I thought it could be useful to track ...
By Eliuccio , 2 hours ago
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RE: My experience with 3 heat pump surveys: Heat Geek, British Gas & Octopus
I have recently gone through the whole process. I got q...
By debT , 3 hours ago
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RE: Electricity price predictions
I suspect it's because housebuilders have lobbied/told ...
By JamesPa , 4 hours ago
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RE: The Hidden Secret to a Successful Heat Pump: Pipe Size Matters
and we have some of the strongest tidal flows anywhere ...
By Old_Scientist , 4 hours ago
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RE: Midea ASHP – how to set weather compensation
@pash44pump - as I said yesterday, see if you can get i...
By cathodeRay , 4 hours ago
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RE: Radiator Sizing Dilemma: Vertical vs Type 33 for Low-Temperature Heat Pump Systems
This looks OK. Overall you have roughly the right amoun...
By Old_Scientist , 4 hours ago
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RE: How can I programme a setback for my Samsung Gen6 8kW heat pump?
I'm not familiar with Hive thermostats/controllers, but...
By Old_Scientist , 4 hours ago
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RE: PV Panels on roof in Conservation Area
Oh I see, I thought that there might be some sort of ga...
By JamesPa , 8 hours ago
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RE: Testing new controls/monitoring for Midea Clone ASHP
Thanks @grantmethestrength and @cathoderay . The reas...
By benson , 18 hours ago
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RE: Help me keep the faith with my air source heat pump installation
@jamespa mine seems changing albeit not by much, 3.21, ...
By AdamK , 22 hours ago
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@majordennisbloodnok The migration hasn't started in th...
By HCas , 22 hours ago
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RE: Buying large amp bidirectional RCD and RCBO
There won't be many RCBOs with a 100mA trip rating beca...
By Transparent , 23 hours ago
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RE: One room is colder than the rest of the house
@jamespa thanks for all the advice. Just so you know, ...
By AndrewJ , 1 day ago
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RE: Daikin Octopus installation update - I saw my first defrost. 😍😂
My MMI is in the loft but I checked the pump flow rate ...
By RadWhisperer , 1 day ago
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RE: Grant Aerona 3 and Drayton system questions
Good man/woman that plumber! Very likely....
By JamesPa , 1 day ago


