Thanks BussS for posting the link as I,m in Norway on a cruise. I founded a sheet metal elbow the same size as the AHot exhaust and use most of the time if I have a close neighbor. By just pointing it up and slightly forward away from the bedroom slide it does a good job of getting rid of any fumes. I only use the diesel boiler when it,s cold or when boon docking so the widows are closed or rarely are the neighbors close but I still use it as it just slips on without the need for a clamp unlike the elbow I use on the generator.