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> Boiler isn't too large. Liek 40 litres?
Can't remember, maybe even 80. Although ceiling height is 220cm or less, so boiler is also not that big.
> That is a longass spirit level! Leveled surfaces are guaranteed.
It was a problem actually. I thought that I had level there, but couldn't find it, found only this. It is too long, so in several places I couldn't use it properly.
Now there is another problem - it is too dark there, especially now with shelf near lamp. Additional lighting is required, maybe LED panel or just two big lamps at ceiling. But I have no experience in electricity at all, so it will be complex task.