Fans vs. BlowersBecause fans and blowers are used as interchangeable terms, it's important to be clear about what you need for your specific application. Consider how the two differ in terms of functionality, common applications, and unique benefits.
FunctionBlowers are electromechanical systems that direct air to a certain point or in a particular direction by means of a fan and controlled channels. Fans themselves are electrical devices that move the air. Fans can also exist separately from blowers to circulate air throughout a space without a specific destination for the air. Picture a blower as a whole assembly with a channel, or an inlet and outlet, that surrounds the fan so large volumes of air can be pumped in a specific direction. The interior fan has small blades and uses centrifugal force to push the air outward; blowers also provide some degree of air pressurization to drive it out and forward. A fan, on the other hand, consists of blades arranged around a central point and a motor that powers the fan and drives the blade motion. Fans are generally powered by electric motors, but some models can use internal combustion engines or hydraulic motors. When you're determining whether you need a fan or blower based on functionality, keep these two rules in mind:
- Blowers operate at moderate pressure, with an air pressure ratio of 1:1.1 to 1:1.2, and fans move large volumes of air with little to no change in air pressure.
- Blowers direct air in a specific direction, while fans circulate air throughout a defined space.
ApplicationsFans and blowers are used for very different applications. The two common applications of fans are:
- Cooling areas by moving the air
- Ventilating spaces, such as living areas
- Drying goods and surfaces by forcefully directing air toward it
- Cleaning surfaces and areas, like a leaf blower
- Increasing the size of a fire
BenefitsBoth assemblies have key benefits that will make them useful in your facility. The unique advantage of selecting a fan is its energy efficiency. They use less electricity than blowers that move the equivalent amount of air. Blowers, on the other hand, are advantageous because of the direct airflow and power they provide. Blowers also have a lower initial purchase price.
Should You Use a Fan or a Blower?Now that you know more about the different uses and advantages of fans and blowers, you can better select the right fit for your needs. Consider these factors:
- If you need a tool that increases air pressure, choose a blower.
- If you need air pressure to remain the same, choose a fan.
- Power Source and Availability:
- If you have more power available, you can choose a blower.
- If you have less power available, choose a fan.
- Air Flow Requirements:
- If you need to direct air in a specific direction, choose a blower.
- If you need indirect airflow throughout a space, choose a fan.