Last seen: Nov 3, 2025
For me: Two full surveys (each taking 3hrs, one of which cost me £300) got to 16kW. Correcting for obvious errors in the surveys got to 10.5kW. Meas...
Ok. The key point I think you have made is that the error only occurs only during the disinfection cycle. That's getting quite deep into NIBE specif...
@matwin If you plan to commission one it might be worth checking that at least one installer will take notice of a blower test. Some can be a ...
1. I certainly did, I found two installers who would accept evidence of actual heat loss and factor it into their calculations in a way which meant th...
Many people with heat pumps heat water only to say 48 with a weekly legionella cycle (often using the immersion) taking it to 60/65. This should all ...
Good spot on the data. The physical size of the 7,kW model is different however so I don't think it's likely the 5 is entirely a SW mod of the 7, how...
Fair enough, I was just checking I hadn't missed something! Thanks for replying.
This is so important. For my money householders need to know how to balance radiators using the lsv. Why? Because, given that its unlikely that radi...
The other important point about wc is that the controller gets the signal to change what it is doing at the same time as the principal driving factor ...
Surely you can 'correct' a mildly oversized rad by turning down the lsv during the balancing process? Certainly that's what I did with my installatio...
As @ashp-bobba says there are lots of variables. My house takes 3-6hrs to change temperature by a degree. I have one room with a fancoil that respon...
Correct. However unofficial data suggests this ignores defrosts and you might have to derate by 10-20pc when it's defrosting a lot, which in fairness...
Latest Posts
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RE: Help me keep the faith with my air source heat pump installation
@jamespa I contacted the installer and asked them to ba...
By AdamK , 2 hours ago
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RE: UFH downstairs and radiators upstairs balancing question
@walnut-tree-cottage My bad, sorry I transpose while tr...
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RE: Who has a V2G EV installation
They certainly look stylish! But it seems that Ander...
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RE: Installer Fitted 9kW Instead of 11kW Heat Pump and Changed MCS Paperwork - What do I do?
And if MCS don’t have one on record that’s an issue bec...
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RE: My DIY Heat Pump installation
@polar-bear, I take my hat off to you. I wish I had the...
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RE: Electricity price predictions
One persons view In sync with the Nesta figures s...
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RE: Oil Boiler & Heat Pump Hybrid System
So in that case they do have an incentive for you, as t...
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RE: Flexi-Orb Heat Pump Scheme: A Game-Changer for the UK's Heat Pump Industry
Ok so that seems to be the key point namely only mcs ca...
By JamesPa , 9 hours ago
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RE: One flow valve appears to be duff
You might want to consider the following common faults:...
By IaAck , 16 hours ago
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RE: When to use Octopus Intelligent Go tariff with my heat pump and battery
We are on the Intelligent Octopus Go tariff. We instal...
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RE: New build installation query
@paullacey While the others wait for more info do you m...
By ASHP-BOBBA , 1 day ago
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RE: British Gas Heat Pump Installation Complaint
@bgno, the other consideration for legionella cycles ar...
By Mars , 1 day ago
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@old_scientist I dont monitor the tank temperature but ...
By bontwoody , 2 days ago
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RE: Say hello and introduce yourself
Hello @paultheheating - I'm a rural Moderator! What's...
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RE: What valves to replace radbots?
Yes. Radbots just replace TRV heads. TRV heads push t...
By JamesPa , 2 days ago
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RE: When will fusion be producing energy?
I am thinking of the case where AI was able to distingu...
By Batpred , 2 days ago
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RE: My experience with 3 heat pump surveys: Heat Geek, British Gas & Octopus
Very definitely. I think the market has changed a bit...
By JamesPa , 3 days ago
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RE: Buying large amp bidirectional RCD and RCBO
The following diagram is taken from the Meter Operator'...
By Transparent , 3 days ago
