@ ROSS Manufacturing, LLC Innovation in Ventilation™ Ross’ 150 Roof Vent U.S. Pat. No. 7,544,124; U.S. Pat. No. 7,780,510; and U.S. Pat. No. 10,415,252 Installation of the Ross 150 Roof Vent should comply with all local standards and regulations. Before beginning a job, determine how much ventilation is required. . Locate the roof vents on the rear or side of the house evenly spaced on the width of the roof. . Mark the location of all roof vents before cutting holes.