If there is an imminent danger, in addition to any other action you take, you should telephone OSHA. Your Right to An Inspection Often, OSHA prefers to investigate complaints by faxing a letter asking about the hazard to the employer, rather than by conducting an on-site inspection.
(November 2014) A Totally Enclosed, Fan-Cooled (TEFC) electric motor is a type of industrial electric motor with an enclosure that does not permit outside air to freely circulate through the interior of the motor. An external fan blows outside air over the frame of the motor to cool it.
The roof exhaust fan or Rooftop Exhauster Fans and ventilators mounted on exterior roof of building, generally utilizing a roof curb for proper seating. Whether using a wall mount fan or roof exhaust fans, they are installed for the sole purpose of removing stale, hot, moisture laden, hazardous or dirty air out of the building. When ventilation is done properly, the HVAC design of a building will also allow fresh air to be pulled into the building through wall shutters, dampers, a supply air fan or intake fans at the same rate as the air removed.