We will learn how fan construction material is determined. We will also learn how various materials are used in the HVAC industry. Fan construction material is determined by application, function, strength and durability. For example, if your project called for a centrifugal utility fan that is located in a coastal environment, the best material best suited for a coastal environment is a steel fan with a corrosion resistant coating. In a kitchen ventilation application, for example, where there is a grease-laden and elevated temperature environment, a rooftop fan made of aluminum is easily cleaned and generally holds up well to the air contaminants and outdoor environment. If strength and durability are important to the project, galvanized, galvanneal or stainless steel may be suitable for use.

The choice will depend on the fan style and application. Material types used in the HVAC industry include steel, aluminum, galvanized steel, galvanneal steel, stainless steel and fiberglass.

Steel is the most common used fan construction material. It is the most economical. It has great strength. Steel has capabilities to withstand high temperatures. Steel can be coated to prevent corrosion. Aluminum is another excellent light weight, medium strength construction choice. It is ideal for outdoor applications and does not require a coating. Aluminum, a spark resistant material, is often used in industries handling combustible gases, dusty grain elevators or fuel storage areas. Compared to stainless steel and fiberglass, aluminum is the more economical choice.

Galvanized steel is another commonly used construction material for fans. Galvanized steel is steel that has a zinc coating that is permanently bonded to the steel. Galvanized steel is the standard for lighter gauge sheet metal and is ideal for outdoor applications. Galvanized steel is also economical.