Last seen: Aug 16, 2025
Further to the above here is the system pressure measured by my Vaillant. I know that this reacts to pump head, because (a) its about 0.6bar less tha...
@jeegnesh My heating switched off altogether for three hours today, so the water pump stopped. Whilst it was off, the water pressure on the controlle...
The output is not, so far as I can tell, limited to 3.8kW when NR is active although I have only limited monitoring capability so could just be wrong....
Possibly 25mm Vs 22 mm pipes. Output depends on surface area principally, but also on form factor. A rad that is twice as tall as another will emit...
@toodles Thanks, very helpful.
I have a 7kW Vaillant and it definitely has a PWM pump. The 12kW may differ of course. This water pump can, if you wish, be turned up or down manual...
I suppose it achieves what it is designed to achieve, namely to protect installers. Just like everything MCS so far as I can tell. He who pays the ...
@toodles Thanks for this. I was working on a 'how to fix an LLH/buffer tank without removing it' script and more or less got, in my thought process...
@declan90 Be aware that this might impact COP negatively as you are aiming to increase the emitter DT. In principle higher emitter DT = lower av...
I note 21 degrees specifies a 25l buffer tank. I would check, if you haven't already, that this is 2 port not 4 port. I would not accept the proposa...
Radiator manufacturers publish the volume of water in their radiators. For any given height and type its proportional to length so they often just gi...
Re the Ebac heat pumps The heading on the table is presumably meant to be kW not kWh! - the 9kW one will be cycling almost continuously with a min...
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RE: Say hello and introduce yourself
@transparent - as a matter of interest whats 52V for? ...
By JamesPa , 2 hours ago
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RE: Heat Pump Servicing & Maintenance – Good Value or Rip-Off?
@heat-pump-newbie Yes you need F Gas engineers like us ...
By dgclimatecontrol , 6 hours ago
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RE: New Vaillant aroTherm Plus in black - When will it come to the UK?
@editor I know it was formally announced at Ish the oth...
By PatrickVito , 11 hours ago
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@moman0311 welcome to the forums. I've received your em...
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RE: Anyone still weathering it out with Agile?
Yes, but now try finding a working phone box….
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RE: Thermostat for Ideal Logic Air with 3 zone support
No harm at all in plumbing it as 3 zones, I would have ...
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RE: ASHP heat output monitoring
@carlo I see there is a discussion in Facebook user gro...
By Tim441 , 1 day ago
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RE: Flexi-Orb Heat Pump Scheme: A Game-Changer for the UK's Heat Pump Industry
MCS have set a potential trap in the new version of MCS...
By JamesPa , 2 days ago
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RE: Who has a V2G EV installation
General comment on battery care... I guess if ev is on ...
By Tim441 , 3 days ago
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@old_scientist like for like comparisons are almost imp...
By Tim441 , 3 days ago
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RE: Who's your electricity provider and what's your tariff?
@old_scientist There is an option in the Tesla app that...
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RE: Mitsu Wireless Controller and MelCloud
On the FTC5 I think this requires the dip switch on the...
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RE: Octopus Cosy & Octopus EV + bidirectional smart tariff, together. What, eh?
@old_scientist me too. Just installed my new heat pump ...
By Eliuccio , 5 days ago
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RE: Is your heat pump insured?
Yup just spoke to Privilege to inform them of my impend...
By Scalextrix , 5 days ago
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RE: Forum updates, announcements & issues
Just to keep everyone in the loop, as the site continue...
By Mars , 6 days ago
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RE: Fast DHW setting on Midea (Clivet) heat pump
@simon-w, is this something you could potentially assis...
By Mars , 6 days ago
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RE: Share Your Experiences with Heat Pump Manufacturer Support
Fwiw I called my installer out for the first time a few...
By JamesPa , 6 days ago
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RE: Long term efficiency degradation
@jamespa yes as I thought thanks. We have a reaso...
By Scalextrix , 7 days ago
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RE: Sunamp Thermino Heat Battery
@jamespa A few days after the installation had been com...
By Toodles , 1 week ago
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RE: Planning Permission May 2025
Fair enough. I have read the legislation and MCS020a ...
By JamesPa , 1 week ago