Hi Graham & Alastair,

Having read Alasters post i realise that mine sounds as if the guy i bought my D4 from was just a fellow sailor, but he was also the main agent for Eberspatcher in the North West of England and his advice to set the inlet to draw from inside of the boat was founded on a great deal of experience. We are about to fit a smaller unit on our other boat, a Westerly Merlin 29 and the inlet will again be sited to draw air from inside of the boat.
It seems to work a treat.