Portable vs Home Sauna: Tested 9 Levels vs Steamer... Surprising Relaxation Breakdown We recently tested the Upgraded Sauna Box for Relaxation, and the experience was nothing short of immersive. Our 2.6’ x 2.6’ x 5.9’ unit impressed us with its compact yet powerful performance, easily fitting into our home space without compromise. The 9-level control System allowed us to customize sessions—ranging from gentle warmth to full heat intensity—and we appreciated the integrated Steamer for added humidity relief.zení What surprised us was how quickly we felt détente; the sauna guest-backed sessions detoxified us thoroughly. Our only slight critique? The manual could be clearer on placement for optimal airflow. Still, for convenience and effectiveness, this portable sauna delivers more than we anticipated.