Last seen: Aug 3, 2025
I have not yet seen a set of performance curves for a heat pump with more than a factor of 3 between max output (at say OAT - 2C) and min output (at s...
Its actually very cold at night just at present, mine is runnoing at upper 30s flow temperature and going into defrost mode overnight! Looks like...
Sorry to hear this is not yet fixed but please do keep posting as those here can help. At present its actually very cold at night despite the warm da...
Sorry to hear this, it shouldn't happen! Did the installers bump up the WC curve again and/or reinstate control by thermostat, undoing all your good...
Which, if you are right (which you may be), is unfortunate to say the least, because climate change and the catastrophic effects it is certain to have...
PHE s can fail, I'm not sure what the most common failure mode is. If a plate separating the two circuits failed pressures will presumably equalise, ...
Hitachi is sadly not alone. The OAT sensor should be in the shade and out of any influence from the heat pump itself. only some manufacturers do thi...
If you have heat exchangers between primary and secondary the two circuits are isolated so a leak in one wont affect the other. So whichever pressure...
Im not sure what you are monitoring but defrost is normally done by switching off the fan reversing the direction of refrigerant flow so the heat ...
If your ASHP has both a pressure sensor internally and isolation valves and you also have a pressure sensor one on the expansion vessel then you can i...
Latest Posts
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There are some projects looking at how smart meters and...
By Jeff , 3 hours ago
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RE: Share Your Experiences with Heat Pump Manufacturer Support
@terry1812 Yes, I use Homely, as to whether Daikin is u...
By Toodles , 16 hours ago
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RE: ASHP heat output monitoring
@carlo - welcome to the forum. I don't know about LG...
By cathodeRay , 20 hours ago
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RE: Why do we need pressurised systems?
@old_scientist If that were the case (and it might well...
By Toodles , 1 day ago
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RE: 300 Liter Tank - Do I have to heat it all?
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RE: Solar Power Output – Let’s Compare Generation Figures
We had an excellent four months (11/3 to 15/7) generati...
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RE: Is this just haze or something more?
I think the present somewhat cooler hazy days show the ...
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RE: My misgivings about installing ASHP and solar panels via the ECO4 scheme...
All noted and accepted and as I say I am sorry that you...
By JamesPa , 2 days ago
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I think it is very much me that is sitting outside the ...
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RE: Replacing Refrigerant on Mitsubishi Heat Pump
@davidalgarve It should just be recovered by both servi...
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Aggregators have been recognised for many years, and it...
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RE: Help me keep the faith with my air source heat pump installation
Great news I edited my previous post (probably af...
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RE: Double or Triple Glazed Windows?
@toodles Glad to hear things are progressing well for y...
By TRBob , 3 days ago
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How to waste energy (and time) playing with AI.
A friend of mine who subscribes to an AI service was ex...
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RE: Heat Pump Books For Beginners – Bodge Buster & From Zero To Heat Pump Hero
@topher you’re more than welcome to, yes. I’ll send you...
By Mars , 5 days ago
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RE: Fitting new shower valve ..........
I’ve never taken a chance when fiddling and changing ou...
By Mars , 5 days ago
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You should contact the council and report the unsatisfa...
By JamesPa , 5 days ago
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RE: Benefits of an extra horizontal loop for GSHP
I would deffo install an additional slinky run, especia...
By Transparent , 5 days ago
