WhisperGreen LED Energy Star-rated fans/lights from Panasonic Eco Solutions provide spot and whole house ventilation. The 12-watt LED light engine with a one-watt LED night-light provides warm, energy-efficient illumination. The fans increase the airflow to achieve the specified CFM output. The models include a dual adaptor for 4- or 6-in. ducts, are HVI certified and comply with ASHRAE Standard 62.2, the ventilation platform adopted by LEED for Homes, Energy Star Indoor Air Quality Program, CalGreen, and California Title 24.