What defines a traditional whole-house fan?

A traditional whole-house fan is characterized by its size and function, specifically its larger diameter, which typically ranges from 24 to 36 inches. This design allows the fan to move a significant volume of air in and out of the home, effectively ventilating the entire living space. Whole-house fans work by drawing air in from open windows and exhausting it through the attic, which helps to cool the home by creating a cross-ventilation effect, especially during cooler evening hours or mild weather.

The size of the fan is crucial as it determines the volume of air it can circulate, making it far more effective than smaller fans that are typically designed for specific areas or tasks. This capacity distinguishes it from smaller fans that can be installed in windows or portable units that do not have the same whole-house application. Additionally, while some fans are designed for specific exhaust purposes, such as those used in kitchens, a whole-house fan serves a broader role in enhancing overall home ventilation.