Our company, Welldoor Engineers fabricates a line of steel ventilators for commercial and industrial buildings. Pressed steel panels are used in the construction of this ventilator. It is installed in a wall and enables air ventilation. This pressed steel ventilator is needed to be installed in multiple areas if proper ventilation within the facility is the requirement. The rectangular shaped steel frame resist rust and corrosion, and therefore has a longer life expectancy. No maintenance is required after installation.