WhisperLine ENERGY STARa® remote mounted inline fans feature totally enclosed AC condenser motors for long-life, energy efficiency and quiet operation. These units can be installed with a single or multiple inlets. Ideal for multiple task ventilation points in a master bathroom. All models can be used to comply with Green building IAQ standards.Features:Housing:-Galvanized steel for long life-Insulated housing to prevent condensation and noise-Tapered duct adapter for easy connection Motor:-Super quiet/energy efficient-Totally enclosed condenser motor for long life rated for continuous run. Safety:-Motor equipped with thermal cut-off fuse Easy Installation:-5 positions for installation-Joist or truss attachment brackets included-Suspension brackets included Grille:-Low profile family design-Adjustable airflow for multi-inlet balance