The 9000/ 9003 Series of photoelectric smoke alarms is designed for residential applications, including homes, apartments, hospitals, hotels and offices, in compliance with UL 217, applicable UBC/ UFC Standards and NFPA 74 / NFPA 72, Chapter 2. Available in many different models, the 9000/ 9003 Series is engineered to virtually eliminate nuisance alarms and deliver outstanding performance wherever reliable fire protection is required.