Opportunity is missed by most people because it is dressed in overalls and looks like work. - Thomas Edison
Generally we add to height of any exhaust to move steam, heat, or hydrocarbons, smells, etc. up and away from infiltration.
If we add hight the exhaust will be right next to their building. So generally we are on the groundfloor, the exhaust is run through the rear wall of our building exiting maybe at a hight of 2.5 meters.The next building starts at a hight of 3 meters as they have a car park on the groundfloor, the building is standing on "legs". And to be honest the air coming out the exhaust is not really that hot and considering the next building is 1 meter away form us has no windows on that side and the air being blown out towards the ground I can`t really see how it would effect them.