Panasonic is the first ventilation fan manufacturer to incorporate a DC motor in residential mechanical bathroom ventilation fans. The Panasonic WhisperGreen series incorporates an enclosed DC motor designed for extremely quiet, energy-efficient operation. The permanently lubricated motor is also engineered for trouble-free, continuous run for several years.

The Panasonic FV-08VKM3 WhisperGreen 80 CFM Premium Ceiling Mounted Continuous and Spot Ventilation Fan with SmartAction Motion Sensor features built-in intelligence called SmartFlow Optimum CFM Technology. This unique electronic-brain lets the fan do what was once thought to be impossible: perform at a constant CFM regardless of elbows and other factors that might hinder performance. Basically, when a WhisperGreen ventilation fan faces static pressure, its speed is automatically increased to ensure that the desired CFM is actually achieved. This allows the fan to perform as rated and makes for easier sizing because the specifiers no longer has to worry as much about compromising the fan's performance.

Panasonic WhisperGreen-Lite ENERGY STAR rated bath exhaust fans
with a light incorporate highly energy efficient DC motors. These models come with variable 2-speed and delay timer controls built-in or as a single speed fan. A motion sensor model is also available. Light fixture includes one ENERGY STAR rated 32-Watt compact fluorescent bulb and one 4-Watt night-light. WhisperGreen-Lite models are ideal exhaust fans to comply with Green building standards.