Ceiling fan

A ceiling-mounted appliance that circulates air with rotating blades. It creates a cooling sensation mainly by increasing air movement across skin, rather than lowering room temperature.

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Axial fan: A fan that moves air parallel to the axis of its rotating blades. A ceiling fan is an axial fan whose blades drive air downward or upward.
Ceiling fan motor: The electric motor assembly that turns a ceiling fan’s blades. Motor type and operating speed shape the fan’s noise, efficiency, and airflow.
HVAC: Heating, ventilation, and air-conditioning systems that manage indoor temperature, humidity, and air quality. Ceiling fans can complement HVAC by improving perceived comfort and mixing room air.
Pedestal fan: A portable electric fan mounted on an adjustable stand. Unlike a ceiling fan, it can be repositioned and aimed at a smaller area.
Electric motor: A machine that converts electrical energy into mechanical motion. Its rotating shaft drives the fan blades.
Fan blade: A rotating surface that transfers energy to air and produces airflow. Blade number, material, length, and shape affect a ceiling fan’s performance.
Thermal comfort: A person’s subjective sense of satisfaction with the surrounding thermal environment. Fan airflow can improve comfort even when the thermostat setting stays unchanged.
Box fan: A portable fan with blades enclosed in a square housing. It sits on a floor or window rather than circulating air from the ceiling.
Aerodynamic lift: A force perpendicular to airflow, generated when a surface redirects moving air. Blade pitch and shape use aerodynamic forces to move air along the fan’s axis.
Downrod: A rigid tube that suspends a ceiling fan below its mounting point. It positions the blades below the ceiling, especially in rooms with high ceilings.