The SP-AP fan is a modular ceiling exhaust fan that offers design versatility and energy efficiency. Features constant CFM EC motor technology that improves indoor air quality when application static pressure is higher than expected. Two-speed capable with built-in time delay. Three built-in high-speed airflow settings of 50, 80 and 110 cfm meet most common applications. Plug-and-play sensor modules (motion, humidity, CO2 and night light) enable easy customization.