Pressure Blowers are used in low volume and high pressure applications, such as handling air, gas, and fumes relatively free of dust and materials. Some are made to handle dust, materials and corrosive vapors. They are designed for ventilating, exhaust, and cooling systems. They provide uniform pressure throughout the operating range. Selecting one of the various wheel options that fit within the housing can vary the design volume of a blower. Fans are available in steel, aluminum, cast iron and fiberglass in numerous configurations.