Hello everyone, I'm a gsr engineer and got a buy to let house with a Baxi solo3 standard efficiency boiler. My tenant is eligible for a boiler on a grant scheme (edf) and they want to put in a Baxi solo 15 he, my dilemma is this, the old boiler is about 10/12 and working well. I put a new fan in it last year, but I don't know much about the new ones. I fit Viessmann when I can and a lot of Baxi avantas - the old Remehas - would you keep the old boiler, or swap it for the new one. Tenant says she is happy with gas bill and not bothered either way. Does the new Baxi have an aluminium hex? I hear the have problems with leaky hex and dodgy pcbs and electrodes. What would you guys do? Thanks for replies in advance