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Old_Scientist
@old_scientist
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Honorable Member
Joined: Jun 16, 2024
Last seen: Oct 10, 2025
Profile Activity
Topics: 6 / Replies: 283
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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...

3 weeks ago
Forum
Government Schemes, Regulations, Planning & Organisations
Reply
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...

3 weeks ago
Forum
Energy Storage
Reply
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...

3 weeks ago
Forum
Energy Storage
Reply
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 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
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 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
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 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Who's your electricity provider and what's your tariff?

@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 weeks ago
Forum
Electricity, Tariffs, Monitoring & Providers
Reply
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...

4 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
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...

4 weeks ago
Forum
Domestic Hot Water & Cylinders
Reply
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...

4 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
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...

4 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: COP is not the only measure of efficiency

Indeed, this made me chuckle. After comfort (however you may define that), the most important factor is cost. My heat pump would run more 'efficiently...

4 weeks ago
Forum
Air Source Heat Pumps (ASHPs)
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