algas... just phoned everest the silly moose on the phone didn't even know what a TI camera was!... she made a half hearted effort to ask someone else and came back with a negative answer!....i chose everest because their suppose to be the best + because i live near heathrow, BAA have a half price deal with Everest, and the outer pane of glass is 10mm thick (for noise abatement)!... and apparently you cannot get this spec anywhere else; even in everest (retail)!....... i too suspect that it is the outer walls causing the down draft, and will definately be installing external wall insulation once the government get their act together and introduce the "green deal" package for domestic households.
andytw... thanks for the link must research into this abit more
andytw... thanks for the link must research into this abit more