Thank you ScottishGasMan. That all makes perfect sense. Yes I did have the control in parallel charging.
I have noted that the house probably won’t cool that much in 30 minutes. That was probably a typical cycling time for boiler off to boiler on in the old system in the coldest times of the...
The story starts from when the energy prices started to rocket. I heard that some big savings could be made by installing Weather Compensation onto compatible boilers to smooth out fluctuations and modulate the boiler.
My boiler is an ecoTEC Plus 418 open vented condensing boiler. My original...