The H455RTUNVD010 is a Non IC, AIR TITE universal voltage 120V 277V remodel housing designed for non insulated ceiling installations, and offers dimming capability with 0 10V DC control systems. Designed for use with EL4 series LED Light Engines, the H455RTUNVD010 offers high quality downlighting along with high efficacy the result being great lighting and significant energy savings. Non IC Housing is AIR TITE but insulation must be kept 3 inches away from all sides of housing.