Advanced FlowPath control with PowerStream airflow straighteners. PowerSteam air straighteners, standard equipment on RAMFAN EX and GX models, produce a powerful, straight, focused beam of air; allowing the fan to be set back further from a structure’s entrance without sacrificing PPV performance. Powerstream technology offers superior ventilation with fan position flexibility, less equipment clutter and reduced noise inside the structure. The PowerStream FlowPath penetrates deeper through the structure, rapidly removing smoke and heat out the exit point. • PPV with PowerStream Air Straighteners for fire rescue fans up to 21 in/54 cm. • PPV with PowerStream is like going from a fog nozzle to straight bore. This allows setback distances to increase five fold. • Both PowerStream and conventional fans can operate in close range of the door. • Only PowerStream fans can be set back as far as 18 ft (5.4 m) and be equally effective.