That's all I tried to express but the language barrier sometimes doesn't let me express myself
but I appreciate that people like you
@oz-plumber exist and read between the lines.
I cannot install the boiler neither give her accurate advise and therefore I asked you gas safe engineers. I am running a business and have to so,ve issues like this too, even though I am not registered. It doesn't look good to say I am sorry but you need to look for someone else's especially not when you got recommended.
However, I am very thankful that people take it serious and helping me out whenever I asked for help. That's the reason why I love this forum that much. Thumbs up to you all