All the process from ordering a new boiler to complete professional installation was absolutely amazing, to be honest. Viessman Vitodens 050-W works as expected from this brand which I can only recommend ( I do not sell them:) ). This is our third property and we had got installed this brand twice. HEATABLE does the job properly and I'll be more than happy to order from them next time. Michael Cox knows his job spot on and I do apologize for forgetting his colleague's name but I was after a night shift. He is a very skilled professional as well. Thank you guys and all the best for you.