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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: MCS Quality Audit – Has Anyone Had One? Did It Lead to Remediation?
@l8again I had one. The chap whom did mine seemed to kn...
By Papahuhu , 44 minutes ago
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RE: Samsung heat pump - data cable issue
Hi Old_Scientist. Samsung are saying tne use of an una...
By Steveimpey , 52 minutes ago
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RE: Electricity price predictions
@papahuhu Groucho Marx had something to say about no...
By Toodles , 1 hour ago
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Given the way radiation and convection effects don't wo...
By Majordennisbloodnok , 4 hours ago
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RE: Octopus Cosy Heat Pump Owners & Discussion Thread
@jamespa haha very true, although the engineer yesterda...
By swwils , 7 hours ago
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RE: Vaillant Arotherm Pro vs new Plus
One of the test modes in the installer menu forces it t...
By JamesPa , 20 hours ago
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RE: What a difference a few degrees make.
Wow. Having accepted the challenge, I ran the cold tap ...
By Old_Scientist , 23 hours ago
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RE: HeatPump maintenance in Swindon area?
@vince31 have you tried using our finder:/p>
By Mars , 24 hours ago
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Looking for beta testers for a new homeowner heat pump tool
Over the past few months I've been building a brand new...
By Mars , 1 day ago
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RE: Indevolt Batteries UK Support & Info Thread
It depends on how you configure it via the app. The ma...
By JamesPa , 1 day ago
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RE: Renewables & Heat Pumps in the News
Be interesting if this results in any wider changes to ...
By Jeff , 2 days ago
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