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Old_Scientist
@old_scientist
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Honorable Member
Joined: Jun 16, 2024
Last seen: Sep 19, 2025
Topics: 6 / Replies: 248
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RE: Big Changes Coming to Our Heat Pump System

3: For retrofits, installers have no clue what existing pipework they are working with, what flow restrictions they may encounter and what head pressu...

14 hours ago
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RE: MCS certificate SCOP vs real-world performance

MCS SCOP 3.84 (design LWT of 47C) Actual real world SCOP 3.75 (running LWTs of 32-35C) So despite running significantly lower LWTs, real world SCO...

14 hours ago
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RE: Powerwall 3 or Myenergi or something else?

I think you need to be sure you are comparing like for like. It is true that you can buy a Fogstar 16kWh battery for around £1750 whilst a comparabl...

23 hours ago
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RE: Powerwall 3 or Myenergi or something else?

Having had a chance to test this now, I can confirm that my Tesla Powerwall 3, whose spec sheet states to be able to supply 185 LRA, is able to supply...

2 days ago
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RE: How to choose Towel Rails for an ASHP

We are lucky enough to have space in both our bathrooms to accommodate a conventional K2 radiator to heat the room and a towel radiator for drying tow...

3 days ago
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RE: External stat issue

Is it reading high or low? Measurement of the outside temperature will directly affect Weather Compensation where the target flow temps are determin...

3 days ago
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RE: Testing new controls/monitoring for Midea Clone ASHP

That does look like the OAT is dropping slightly due to the cooling effect from exhaust air. I see similar on my Samsung, who's OAT thermocouple is sh...

3 days ago
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RE: Ya can’t win! It is S*d’s Law!

@toodles this is another advantage of being on IOF. When there is a 'free electricity' hour, if you are on IOF then Octopus will credit you with a 'fr...

4 days ago
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RE: Big Changes Coming to Our Heat Pump System

If the goal is to deliver uniform heat around the property, I'm wondering why there are multiple zones, so like you I am interested to see Brendon's a...

5 days ago
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RE: Mixergy Tank Failure

I agree with @jamespa. If you are not using the tank following advice from Mixergy, then I'd drain it as there's no point leaving it pressurised wit...

6 days ago
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RE: Heat Pump Servicing & Maintenance – Good Value or Rip-Off?

I think either can be highly reliable or highly unreliable. We once lived in a new build and the gas boiler had numerous call outs over a 3 year per...

1 week ago
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RE: COP is not the only measure of efficiency

We keep all our TRVs fully open using the whole house approach. When we are away in winter I turn the flow temps down to minimum and use the room ther...

1 week ago
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