Fans function with rotating blades, which are often called vanes. These blades create and circulate airflow in a certain space. Usually, fans are powered by electric motors that are housed in the central casing of the fan unit.
Fans aren’t only used to cool you down. There are several other purposes for fans, they provide ventilation, circulation, comfort, temperature control, drying, fumigation extraction, winnowing and fire drafting. Many different styles and designs of fans exist on the market today. Fans offer a variety of utility in terms of where you can place them; you can build fans into ceilings, windows, walls, or even place them on tables and floors. Fans are also used in electronic hardware, such as computers, leaf blowers and hair dryers, as well as cars and automotive engines.
In residential homes today, people use high tech fans to reduce the heat when relaxing in the sun room, dining in the living room, or sleeping in the bedroom. Some residential homes are now installing fans in kitchens and bathrooms. High tech fans are very common in houses and commercial buildings located throughout all of Los Angeles.
Centrifugal Fans – Commonly referred to as a squirrel cage or scroll fan, centrifugal fans use a moving component known as an impeller to disperse air in right angles towards the fan’s intake. The air, now inside the fan, is then spun outwards by the momentum of the moving fan. Hair dryers, leaf blowers and air mattress inflation devices all use centrifugal fans.
Axial-Flow Fans – These fans use their blades to direct airflow parallel to the shaft. Typically, an axial-flow fan has a 300-400 millimeter diameter and can work under pressure as large as 800 Pa. Typical examples of axial-flow fans include ceiling fans, computer fans, variable pitch fans, and cooling fans.
Cross-Flow Fans – Usually used extensively in the HVAC (heating, ventilation, air conditioning) industry, cross-flow fans tend to be longer than they are wider to maintain two-dimensional airflow. Cross-flow fans have been standardized by the HVAC industry due to their quiet operation, ability to fit in small places, and high-pressure output.