Hi - Boiler engineer said that my boiler needs better ventilation.At some point the front door,which had some sort of vent, was changed to a d/g one(boiler's in the entrance hall) He told me he could install one through the cavity wall for £120.Only trouble is he's let me down twice - 2 mornings off work :( I want to do it myself now,I've looked in the Screwfix catalogue but can't find what the plumber described to me. He said it was a vent that went straight throught the wall and was "Easy to do" - so easy he hasn't turned up! Anyone any idea what I can use and who stocks them? ( for a Jerry built
1980's house with cavity wall)Thanks,
Trevor P.