Thanks to an impressive array of advanced options, the new WhisperGreen Select is the ideal all-purpose IAQ Solution. The ingenious new Pick-A-Flow technology gives you the ability to select your required air flow with just the flip of a switch. Then, a set of four unique Plug N Play modules allow you to further customize the fan by choosing Multi-Speed Operation, Motion Sensor, Condensation Sensor and Automatic LED Night Light. With Multi-Speed you can select the proper CFM settings to satisfy ASHRAE 62.2 continuous ventilation requirements. WhisperGreen Select also features our revolutionary DC Motor with SmartFlow optimum CFM technology and our unique LED replaceable lamps. Our new Flex-Z Fast bracket system provides quick and easy installation. WhisperGreen Select can also be used to comply with LEED for Homes, CalGreen and ENERGY STAR® for Homes 3.0.