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2. Centrifugal fan - Wikipedia

   en.wikipedia.org/wiki/Centrifugal_fan

   Learn about the history, construction, and types of centrifugal fans, mechanical devices for moving air or other gases in a direction at an angle to the incoming fluid. Compare centrifugal fans with axial fans and positive-displacement blowers, and see examples of applications and components.

3. Axial fan design - Wikipedia

   en.wikipedia.org/wiki/Axial_fan_design

   Learn about the principles, parameters and performance of axial fans, a type of fan that causes gas to flow through it in an axial direction. Find out how to calculate the pressure, thrust, efficiency and power of axial fans using slipstream and blade element theories.

4. Heating, ventilation, and air conditioning - Wikipedia

   en.wikipedia.org/wiki/Heating,_ventilation,_and...

   HVAC stands for heating, ventilation, and air conditioning, which is the use of various technologies to control the temperature, humidity, and purity of the air in an enclosed space. Learn about the history, functions, and types of HVAC systems, as well as their applications and benefits.

5. Air handler - Wikipedia

   en.wikipedia.org/wiki/Air_handler

   An air handler, or air handling unit (AHU), is a device used to regulate and circulate air as part of a heating, ventilating, and air-conditioning (HVAC) system. Learn about the construction, classification, and major components of AHUs, such as filters, coils, fans, and dampers.

6. Fan coil unit - Wikipedia

   en.wikipedia.org/wiki/Fan_coil_unit

   A fan coil unit (FCU) is a device that combines a heat exchanger and a fan to condition air in HVAC systems. Learn about the different configurations, applications, and control methods of FCUs, as well as their advantages and disadvantages.

7. Shaded-pole motor - Wikipedia

   en.wikipedia.org/wiki/Shaded-pole_motor

   A shaded-pole motor is a type of AC single-phase motor with a copper ring or bar around each pole to produce a rotating magnetic field. A shading coil is a single-turn winding that delays the phase of magnetic flux change and creates a second electrical phase.