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Last seen: Jun 26, 2026
Making progress each time @crimson, and learning all the while. We never stop learning on these systems so it seems. 😉 You have zone control valves a...
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...
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Degrees of Separation
Latest Posts
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RE: Volumisers in Heat Pump Systems: Does Placement Matter?
@dave, I think @jamespa has probably identified the mos...
By Mars , 1 hour ago
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@kilgorexv, I actually think doing your own calculation...
By Mars , 1 hour ago
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RE: Plug and play solar. Thoughts?
My thought is simple. Bring it on and bring on plug in...
By JamesPa , 15 hours ago
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RE: Heat Geek mini store vs pump size
Yes I agree, that’s why Heat Geek have most likely sele...
By Tomtheheatingengineer , 1 day ago
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RE: Who's your electricity provider and what's your tariff?
@chandykris Swings and Roundabouts, you win some…. ...
By Toodles , 1 day ago
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@tomtheheatingengineer, thank you, and welcome to the f...
By Mars , 2 days ago
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RE: HeatGeek vs Octopus surveys: puzzling disparity - any ideas why?
@majordennisbloodnok @tomtheheatingengineer For my ...
By JamesPa , 2 days ago
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RE: Do I add Air Con or MVHR to existing A2W ASHP?
There is scope for product development here. I for one...
By JamesPa , 2 days ago
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RE: Is the "divide by 2900" rule still valid?
Really flow rate is a pipework limitation not a water p...
By JamesPa , 2 days ago
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RE: The good, the bad and the not that great – my heat pump installation
@burtis, I’ve followed this thread pretty much from the...
By Mars , 5 days ago
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RE: Starting Our Heat Pump Journey: 1962 build 3 bed detached house
First time poster here but I can share my experience as...
By SCH , 5 days ago
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RE: Is it the house or the equipment?
...which, I've found out, is pretty much impossible to ...
By Majordennisbloodnok , 6 days ago
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