
Exhaust and supply fans require a magnetic starter switch with 120 volt holding coil. Coils (exhaust and supply) should be electrically interlocked for simultaneous operation. FIRE PROTECTION NFPA Standard No. 96 and local codes require a fire extinguishing system for protection of the duct collar and plenum of nonwaterwash ventilators. Hood shall be designed to accommodate piping for Ansul R-102 fire suppression (plenum and duct protection). Fire protection system provided by HVAC contractor or