The Broan 103023 Custom Hood Kit fits into custom cabinetry from 30-Inch to 42-Inch wide. Powerful, quiet 360 CFM/5.0 some performance (vertical discharge only). 24-Inch fluorescent tube lighting (bulb not included). Heat Sentry detects excessive heat and adjusts blower speed to high automatically. for ducted installations, includes damper/adapter for 31/4-Inch x 10-Inch duct. Must order model 103123 Rough-In Kit (sold separately).