Last seen: Oct 24, 2025
Good points there @mikefl especially the low modulation of the Grant. I very much like that on my 10kW myself. We switch the Grant off overnight, not ...
Clanking is probably thermal expansion & contraction of the copper pipe and/or radiator as it warms up/cools down. I doubt this is air in the syst...
My personal opinion: Samsung. Grant unit is a good workhorse, and my calculations of the capacity it supplies are approximate, but I’ve never observed...
@heliohelp I think you've been very unlucky there, both in choice of installer, and choice of heat pump OEM. The Heliotherm looks a quality product, e...
@ggw no, all gone quiet from Grant lately. I was advised I was getting a Grant smart controller to install for trial, but it's not yet arrived.
😆 😆 😆 Greg Jackson might like it, but not everyone wants a bright purple waste bin on their patio.
Heat rises, a phenomena well known, 'stratification', but strangely not accounted for in multiple storey building heat loss sizing estimates. Actually...
EDIT: Ian's covered most of this, he's got quicker fingers! But my thoughts as per his.... I think you've got a great understanding @tobyg of the to...
This is the crux of it @derek-m. I've just come off a call with my colleagues in Oslo. Right now it is -13degC and 74% RH, somewhat typical winter w...
Yes, at -3degC target LWT should be 45degC, but tends to never get above 40degC, leaving a shortfall of heating duty and requiring supplementary secon...
I can't comment on the calculations your installers have prepared, which I presume include for all ECO4 upgrades including internal wall insulation. T...
Totally agree @mikefl. The way Grant runs the CH and DHW is dumb, with no intelligence between the two. It's basic S plan stuff from 40 years ago. The...
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RE: Testing new controls/monitoring for Midea Clone ASHP
Thanks @grantmethestrength and @cathoderay . The reas...
By benson , 4 hours ago
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RE: The Hidden Secret to a Successful Heat Pump: Pipe Size Matters
@old_scientist and @allyfish , thank you both for this....
By colinc , 6 hours ago
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RE: PV Panels on roof in Conservation Area
@jamespa Thanks for the input James, recording Oil usag...
By colinc , 7 hours ago
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RE: Midea ASHP – how to set weather compensation
@dgclimatecontrol - you have awoken me from my several ...
By batalto , 7 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 , 8 hours ago
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@majordennisbloodnok The migration hasn't started in th...
By HCas , 9 hours ago
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RE: Radiator Sizing Dilemma: Vertical vs Type 33 for Low-Temperature Heat Pump Systems
Yep that's it, but the current design would re...
By DREI , 9 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 , 10 hours ago
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RE: Electricity price predictions
Because its what the investors demand, simple as that. ...
By JamesPa , 10 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 , 12 hours ago
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RE: Mitsubishi Ecodan R290 10kW performance
@dgclimatecontrol I only have 1 cylinder and I can conf...
By Ecoste , 12 hours 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 , 13 hours ago
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RE: Grant Aerona 3 and Drayton system questions
Good man/woman that plumber! Very likely....
By JamesPa , 13 hours ago
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RE: New build installation query
@paullacey Hi I have managed to save the fil...
By JamesPa , 14 hours ago
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Thanks for the response @batpred Your conversational ...
By Transparent , 16 hours ago
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RE: What should we do with our Aga?
One slightly off-the-wall suggestion is that, if you li...
By Majordennisbloodnok , 17 hours ago
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RE: My experience with 3 heat pump surveys: Heat Geek, British Gas & Octopus
If you paid for any of the assessments try asking for t...
By JamesPa , 1 day ago
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I've created a separate post here, wondering about radi...
By DREI , 1 day ago
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RE: Air source heat pump roll call – what heat pump brand and model do you have?
@ecoste, @walnut-tree-cottage these are both great piec...
By JamesPa , 1 day ago


