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Last seen: Jun 15, 2026
Recent daily electricity bills in kWh.
What the hell. There is exactly one reason to use a heat exchanger on the main circuit: when fluids on both sides are different, for example: - He...
Ecodan speaks a proprietary protocol on its connector "CN105". It's been reverse engineered and it is possible to use an ESP32 as an interface to Home...
Dry rotor circulators are noisy, but wet rotor circulators are supposed to be almost completely silent. I have a Grundfos Alpha 1L which is perfectl...
Here the heat pump runs continuously and generates power, which manifests as DeltaT between flow and return, and is also displayed as "Heat" power in ...
I wonder how much coal the Germans are going to burn when they run out of natgas.
These systems should work fine without requiring the user to become a part time heat engineer and plumber. Unfortunately, visits from the "tech wizard...
It's possible to estimate the minimum power from the inverter modulation range, often called "Compressor Hz" in the technical documentation: for my LG...
This looks like a practical solution 👍
Here's a LibreOffice spreadsheet. I put the formula for pipe pressure drop in a macro, so you'll have to enable macros in the options when it loads....
Pylontech US5000 stores about 4.3 kWh accounting for inverter losses and costs 1000€. Over 3000 cycles this means one kWh going through the battery co...
I also totally agree with the recommendations from Mars and James 🤣 All installers who came here wanted a big buffer tank. When I attempted...
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Degrees of Separation
Latest Posts
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Why do you want to maintain a specific deltaT? The out...
By JamesPa , 10 minutes ago
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RE: Heat pump installation quotations
@batpred Excellent, thank you very much!
By sttpd1917 , 41 minutes ago
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Hopefully this will answer your question. To...
By ASHP-BOBBA , 41 minutes ago
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RE: Help me keep the faith with my air source heat pump installation
I would be interested to find out if others do this and...
By ASHP-BOBBA , 50 minutes ago
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Harvest Thermal - ASHP with a smart thermal battery
I thought people here might find this interesting, even...
By springswood , 2 hours ago
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Don't you dare. You just carry on as you are; as @batpr...
By Majordennisbloodnok , 3 hours ago
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RE: Heat pump design review please: 5 kW Vaillant aroTHERM Plus heat pump
@ragtime27 some rooms in our house only have one place ...
By Judith , 3 hours ago
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@mkz, that's very helpful. Even if Urban Plumber are no...
By Majordennisbloodnok , 6 hours ago
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RE: Several AC coupled batteries
That is a good point, a manufacturers can stop trading,...
By Batpred , 7 hours ago
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RE: Indevolt Batteries UK Support & Info Thread
Hi @hanno - good question. The range of hybrid invert...
By Transparent , 7 hours ago
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RE: GivEnergy inverter tripping due to over-voltage?
@transparent the inverter was installed in 2021 and afa...
By Tim441 , 7 hours ago
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RE: Say hello and introduce yourself
I hope so, @toodles. It's not often that we see a situa...
By Majordennisbloodnok , 11 hours ago
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RE: Electricity price predictions
Good point, I do expect the bonus of putting my energy ...
By Batpred , 1 day ago
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RE: Daikin ESPAltherma and Home Assistant installation
@bash, something we haven't touched on already relates ...
By Majordennisbloodnok , 1 day ago
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