ok u have to make a box with outside wall of your house,,,, this box should have only opening towards the outside wall rest all should be closed except a door to start it....,,, if u make this box out of bricks than ok if using wood or metal than u wana put in sound absorbing foam on the walls,,,, also use a metal pipe attached to exhaust to direct the exhaust in up direction and this pipe should be long enough to reach the roof of ur house,,, below is a mock up... it might not be use full for u but for some one else with 6-8kva generator

