Hi ya'll, I am a newbie to this forum and want to get some feedback about a direct vent out the back of an Enviro Ascot which I am going to have installed in a cottage I am building. I have read in different places about direct vents not drawing well unless there is somewhat of a rise in the vent. I want to vent out the back. I would also like to know if there is much heat loss venting directly out the back.