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  1. I

    Knowledge sort on hidden programming of Ideal Logic² Max Heat 15kW to extend recycling time

    I stopped using Nest very quickly and I don’t use Nest anymore so I can’t advise on that sorry.
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    Knowledge sort on hidden programming of Ideal Logic² Max Heat 15kW to extend recycling time

    Nest has very limited opentherm capabilities sadly. I used it in my previous house; ideal logic combi; but it suffered from short cycling. In terms of opentherm, It turns out that many boilers accept the opentherm command MM=0 to modulate at minimum capacity level but the boiler doesn’t respect...
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    Efficient gas boiler, show and tell

    Thank you for sharing that data, it’s an interesting perspective (two countries) and a good point of reference in terms of what absolute values we are talking about.
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    Efficient gas boiler, show and tell

    Thank you! That's really interesting; this would be great to compare the heat output value from the precise flow rate perspective. I will consider it! I can't explain it properly either, there are definitely more questions than answers in all the numbers used and laws of physics are hard to...
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    Efficient gas boiler, show and tell

    Thanks! What do you mean by flow meter can I ask? If you are referring to flow water temperature only, then it is also provided in real time by opentherm, and both (flow and return) are constantly used to calculate and adjust the required heating curve (target flow temperature). For heating...
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    Efficient gas boiler, show and tell

    Yes, it’s not a lab tested calculation. I guess I could temporarily set opentherm to monitor mode only and compare the relative performance gains (with vs without SAT) that way. In the link I shared in the previous post, I discussed the net vs gross efficiency too. According to the legislation...
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    Efficient gas boiler, show and tell

    Opentherm tells the real time modulation of your boiler. Based on that information and the manufacturers data sheet, we can calculate the real time heat output. For example, if the current modulation of the boiler is 0.5% (low load) and mean water temperature is about 40 C degrees, the heat...
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    Efficient gas boiler, show and tell

    The basis for the calculation is how much gas has been consumed which is read automatically from my gas smart meter in kWh; the heat output by the boiler in kWh minus the electricity needed to run the boiler. I use this Home Assistant integration to get the gas data...
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    Efficient gas boiler, show and tell

    I would say it’s a decent indicator given what we can calculate but with awareness that there are many more real life factors to consider. Other boilers real time data that I know of for comparison: https://emoncms.org/app/view?name=GlowWormBoiler&readkey=88a6c522550d5fd6ffece80a646b4952...
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    Efficient gas boiler, show and tell

    The gas reading is done about every 2 hours, so if you see anything above 108% that means, for the selected period on the graph, the gas reading has not updated just yet. The 108% figure is the max I would consider valid which is the latent heat. You can read more about GCV, NCG and ERP. EmonCMS...
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    Efficient gas boiler, show and tell

    Thanks! I did not change my radiators, they seem to be ok but I was considering it. I think there could be some further efficiency gains but I am not sure cost wise it would make sense. Return temperature is under 30 C on average. It’s not short cycling, but it’s working with 15min intervals...
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    Efficient gas boiler, show and tell

    Hi All, I made my gas boiler very efficient and I would like you to have a look at it, if you are interested! Here's my fine-tuned Ideal Logic Heat H24 real time performance. https://emoncms.org/app/view?name=MyBoilerIdealLogicH24OpenthermSAT&readkey=1d29c637a4817acdf6e6e271850c9026 The...
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