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Last seen: May 8, 2026
As I understand it, if a slowly rising common mode DC is passed through the AC only type of RCDs then it will saturate the core in it, and then it can...
We have two car chargers with different plugs🙄 - a 32A one and a 10A one. The larger one is fed with 6mm2 cable from its own tiny CU (looks j...
I’ve seen our mains voltage very high on occasion, but I’ve never known anything happen due to it. We get 253V on a sunny day here - I looked in the ...
There’s no definitive magic deltaT for a heatpump, just pragmatic ‘generally optimum’. If you put more power into the water pump, the deltaT will redu...
That 2.5% cost increase every degC corresponds to my home-made graph pretty accurately. I was confused by the graph above at first, but then I unders...
Technically I could perhaps be called a heat pump designer, having designed and built the one gshp system that has heated our home for 3 years. It’s ...
Why do panels get damaged if not connected? When they are normally in the sun, they get 800W/m^2 evenly distributed, and they warm up everywhere. S...
In the solar panels. On a nice sunny day, a square metre of panels would get 1kW from the sun. Of this we might expect 200W of electical power if...
We had our gas meter removed too by Octopus, for free. It took the guy 20 minutes to do - he turned off the incoming gas lever in our cabinet, remove...
I notice on a pic on page 2 what looks like heatpump gubbins (buffer, tank, pump, pipes) in a cold ventilated loft? How much insulation is there in ...
As the boiler is just on/off at a given running temp, can you drop the temp down to the lowest acceptable, leaving it on most of the day (18hours+)? ...
Do your gas boiler have weather compensation? If so, enabling it will improve efficiency. I assume the boiler is huge, and can operate at high power...
Latest Posts
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Mentally you have to separate the ac side and the DC si...
By JamesPa , 4 hours ago
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RE: Help me keep the faith with my air source heat pump installation
My heating developed a really severe case of noise and ...
By JamesPa , 6 hours ago
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RE: Octopus Cosy 12 Heat Pump Regret: Incredibly Loud, Poor Heating & Constant Hum - Help!
@l2jad I was just thinking all things being equal. Our ...
By AndrewJ , 13 hours ago
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RE: Heat Pump Manufacturers Recommending Buffer Tanks
Hopefully the ambient temperature sensor drives a weath...
By JamesPa , 1 day ago
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RE: How many people are happy with their ASHP and do you believe them?
Im looking into these and my figures. The think that I...
By JamesPa , 1 day ago
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Hi, Does anybody have experience with Heat Geek insta...
By sttpd1917 , 1 day ago
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RE: Heat Pump Operation in Summer - Valliant 7kW
Yes - we use our Mitsi 14kW unit for cooling. I have j...
By downfield , 1 day ago
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I will soon be struggling. Admittedly it is the summer,...
By Batpred , 1 day ago
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RE: Indevolt Batteries UK Support & Info Thread
Not known yet. I've asked a local Councillor to follo...
By Transparent , 2 days ago
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Hard to tell but I think I have placed the arrow on wha...
By ASHP-BOBBA , 2 days ago
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RE: Who do I complain to about a poor ECO4 installation, can anyone advise?
Great. My guess is that you will need to re-adjust yo...
By JamesPa , 2 days ago
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RE: UK warm homes plan - how can it be delivered?
I know it is not as simple as going from a fossil fuel ...
By Batpred , 3 days ago
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@editor this is great news.
By ASHP-BOBBA , 4 days ago
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RE: Daikin Altherma 3 with Fan Coils in Puglia (Italy)… Sanity Check on System Operation
AH (Absolute humidity) is grams of moisture per volume ...
By bobflux , 4 days ago
