Our company, Welldoor Engineers chose steel as a raw material for most of our products, that include doors, windows, frames and ventilators. The rectangular type steel air ventilator works best in all facilities, from office workspace, office space in basement, workshop, factory to warehouse. The wall mount steel air ventilator is mainly installed during the construction of building, otherwise space has to be created in the wall for its installation. Steel air ventilator features non-adjustable flaps. Multiple ventilators at different corners of the facility are essential to keep the air flowing through the facility. It is possible to maintain indoor air quality through proper ventilators.