What Are Treadmill Ceiling Height Requirements? Horizon Fitness Updated August 25, 2021 20:19 To calculate a safe ceiling height for your treadmill please add 12" to the height of the tallest household user. Was this article helpful? Yes No 0 out of 0 found this helpful Have more questions? Submit a request Related articles What are Dimensions and Weight of Ellipticals? What is the Difference in Roller Sizes on Horizon Treadmills? How Do I Find My Total Treadmill Mileage? What are Treadmill Incline Ranges? What are Treadmill Electrical Requirements? Comments 0 comments Please sign in to leave a comment.