Broan RMIP45 Pro-Style Hood Insert with External Blower, 45" Especially designed to be installed in custom hood for use over residential commercial-style cooking surfaces Optional liners in 48" and 60" widths protect custom hoods. Optional liners allow depth adjustment from 23.5" to 26.5" Halogen lighting: 33" 2 x 50 watt; 45" 3 x 50 watt (PAR20) Bulbs Not Included Controls: rocker switches for lighting and on-off, knob for infinite speed Heat Sentry turns blower ON to HIGH speed when excess heat is detected