The Rezūm System is powered by convective water vapor energy to deliver targeted, controlled doses of the stored thermal energy in water vapor directly to the region of the prostate gland with the obstructive tissue causing the lower urinary tract symptoms secondary (LUTS) to benign prostatic hyperplasia (BPH). Rezūm Water Vapor Therapy provides durable significant improvements for BPH patients with a prostate volume > 30 cc through five years.