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Last seen: Jan 6, 2026
@cathoderay this is great news. I'm pleased we're getting somewhere. There's a noticeable step change in the power output starting with the 18:00 re...
Hello, Sounds like the flow goes through the magnetic filter before it gets to the PEX, so that's good. 22mm and 1.8m3/hr is about 1.3m/s. I thin...
A brief explanation of reading vendor pump curves. Here's a simple heating system. It's got 3 radiators, each one can be turned on or off separatel...
Something else crossed my mind when I posted on a discussion about the order components should installed. You mentioned you reversed the direction o...
Hello All,I'm conscious I've turned up on the forum and am writing these long posts full of apparent technical detail. I've been troubleshooting heat ...
Hello All, remember your designing a loop transferring liquid water. The pump just moves the liquid round in circles. It makes no difference to syst...
@cathoderay I'll put something together about pump curves and system curves. But to help you, I suggest the following: Open all the TRVs and locks...
Hello, I can explain all the pump curve information, but it will take a while for me to put some pictures together. For now, lets work on the basis t...
^Hey, look at that, it worked 🙂 OK, This is a pump curve. The top one shows Head against volumetric flow at different pump speeds. The chart show...
Hello again,I wonder what's going on here? The system seems to have landed at an equilibrium point. LWT = Set_LWT and the compressor has slowed do...
Hello,I'm not very good with using quotes from forum posts, so I'll try to use headings insted.How did I calculate the secondary flow rate?If you igno...
I found an install manual for an MD16IU-008DW unit. Can you find the value of dT1SH? It might be in "ServiceMan / 3. Heat mode settings" The manu...
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RE: Anyone concerned about GivEnergy?
An incredibly enlightening piece on the subject by @maj...
By Mars , 1 hour ago
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Home automation and the cloud; is there a better way?
You’ve just had a brand new system installed (heat pump...
By Majordennisbloodnok , 1 hour ago
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RE: End-of-Life Heat Pumps: How Do You Dispose of an ASHP in the UK?
We've started to document everything, and part 2 of the...
By Mars , 1 hour ago
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RE: Summer usage. Why is my Vaillant Aerotherm using so much energy on "heating"?
So the red bars are 'DHW' and the yellow bars 'heating'...
By JamesPa , 3 hours ago
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Its good kit the Midea and significantly cheaper, you w...
By ASHP-BOBBA , 6 hours ago
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RE: Indevolt Batteries UK Support & Info Thread
Have you tried cutting the grid feed to see what actual...
By JamesPa , 6 hours ago
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Contractors pack for inta antifreeze valves are around ...
By ASHP-BOBBA , 6 hours ago
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RE: Renewables & Heat Pumps in the News
Critics and naysayers will be negative whatever the gov...
By JamesPa , 6 hours ago
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RE: Microbore heat pump installs
In principle you are almost certainly right, but in pra...
By JamesPa , 16 hours ago
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RE: Electricity price predictions
@old_scientist We are a low mileage home, so bulk of ou...
By ChandyKris , 18 hours ago
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There are just too many unknowns for me to comment on p...
By Transparent , 19 hours ago
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RE: What is the main ‘dictator’ of Agile’s unit price?
@toodles I keep an eye on wholesale prices and energy m...
By ChandyKris , 20 hours ago
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RE: Brand and installer questions for ASHP
Strange, perhaps it doesnt use modbus which the third p...
By JamesPa , 22 hours ago
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RE: Upgrading my system, how far do I go?
For comparison, my PW3 with 11.04kW inverter, will char...
By Old_Scientist , 1 day ago
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RE: Changes to Tesla Powerwall Charging Regime?
Elon gate - legendary! I take my hat off to you @toodle...
By Old_Scientist , 1 day ago
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RE: Mitsubishi Ecodan not good enough ?
Thanks @goody, appreciate the feedback and sorry you ha...
By marcexec , 2 days ago
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RE: Minimum and Zero Disrupt Heat Pump Installations
True (first sentence) Thats the reason to consider th...
By JamesPa , 2 days ago
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RE: High air source heat pump running costs – Vaillant AroTherm Plus
Quite right. I was using a rough guesstimate of doublin...
By Majordennisbloodnok , 2 days ago
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RE: My Grant R290 9kW Heat Pump Installation
Again, really don't know how accurate this is! &nb...
By petch , 3 days ago
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RE: MCS Quality Audit – Has Anyone Had One? Did It Lead to Remediation?
@toodles The whole scheme is a shocking waste of money....
By Papahuhu , 3 days ago
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RE: DIY or Don’t Touch? Solarman Smart Meter Install
Yes, and these guys would probably be my preferred inst...
By Batpred , 3 days ago
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RE: Hot water tank lose heat rapidly on random days
@jamespa Hopefully their reasons are well intended! ...
By Bash , 3 days ago
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RE: Ecoflow UK Support & Info Thread
As mentioned above, we’ve got our full review of the Ec...
By Mars , 3 days ago
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RE: Say hello and introduce yourself
@sonosppp welcome to the forums. I see you've posted in...
By Mars , 4 days ago
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RE: Guidance with installing a new heating system
@bobflux Great, thanks for the advice. The pipe has an ...
By Hamilton , 4 days ago


