I would like to write a good review but it was one bad experience after another with this job i'm afraid: The initial surveyor was quite happy to put the Flatmaster air intake immediately above a boiler flue outlet - a few safety issues there to say the least. A failed promise on giving me 30 mins or so warning of the workmen arriving at the property. And, the electrician didn't connect the Flatmaster properly i.e. he screwed the terminal screws onto the mains wire insulation instead of the bare copper - (it worked because the screw just and so pierced the insulation) a few safety issues there!