Outcome: I went to the Local Authority Building Regulations people and was told by an Inspector that they would have no problem with the terminal being sited on the wall where the old one is; no plume kit, no making holes in the eaves or roof, nothing apart from sealing up the small old larder ventilator that fell within 300mm from the terminal.
He wanted to know where my CORGI registered Installer had got the idea from so I called the Installer there and then on my mobile and said I was with a Buildings Inspector who was wondering where my installer had got his information. I was met with a cagey answer about the flue extensions having been "policy at a place I used to work". I said thanks and I would get in touch with him about getting the work done with no flue extensions as it had now been verbally approved by the Inspector.
Surprise, surprise, the next day the Installer hit the 'reject' button whenever I tried to call his mobile.
You can all draw your own conclusions, as I have done.
He wanted to know where my CORGI registered Installer had got the idea from so I called the Installer there and then on my mobile and said I was with a Buildings Inspector who was wondering where my installer had got his information. I was met with a cagey answer about the flue extensions having been "policy at a place I used to work". I said thanks and I would get in touch with him about getting the work done with no flue extensions as it had now been verbally approved by the Inspector.
Surprise, surprise, the next day the Installer hit the 'reject' button whenever I tried to call his mobile.
You can all draw your own conclusions, as I have done.