The Broan-NuTone BES8 Roomside Series Energy Star humidity sensing bathroom exhaust fan offers versatile easy installation without attic access and no drywall cutting necessary. This bathroom exhaust fan is the ideal retrofit solution saving time and reducing complexity. Built-in humidity sensing automatically turns the fan on and off when humidity in the room reaches the user adjustable set point, removing moisture to reduce the risk of mold and bacteria. The design features patent pending technology with SlideClip grille/cover, making cleaning easy with a springless attachment. The CleanCover grille also offers a seamless design that blends into the ceiling for a modern appearance. This series is Energy Star certified reducing energy consumption by over 50% compared to standard bath fans. Engineered for Energy Star 4.1 this exhaust fan meets building code requirements and reduces call backs. All the desired features of a premium bathroom exhaust fan at an affordable price for cost-conscious builders, contractors and DIYers. This HVI certified product has efficient performance to remove moisture, odors and pollutants to provide better quality of air for better quality of life.Patent pending technology for a springless attachment that allows for fast installation of the grille/cover and easy cleaningModern CleanCover grille blends into the ceiling and allows for quick, easy cleaningReduces energy consumption by over 50% compared to standard bath fansSound as quiet as a soft conversation (1.5 sones) with efficient ventilation for rooms up to 75 sq-ftPatented technology provides great airflow and creates an airtight seal from inside the housingRoom side installation makes it possible to retrofit with no attic access and without having to cut drywall, saving time and reducing complexity