Gen. exhaust

[gitrdun]

My buddy is installing a gen set in his Monty. I say the exhaust should go out the right side away from the bed room and he says to go out the left side under the bed slide. He says to much noise out the right because that is where you set. I say not the left under the slide because of possible fumes. But I don't know I don't have a generator mounted in mine. Help Mr. Wizard.