A:AnswerHello,
Thank you for your inquiry.
You can vent out of a back wall but we recommend the duct work go straight up at least 15" before making a 90 degree elbow to vent out the back wall.
We also recommend no more than three elbows be used in the ducting to allow the hood to function to its full capability.
If you have any other questions about installation you can call us at (614)777-5004.
We would be happy to answer any questions you may have.
Thank you.
