Larson Electronics has released a 24-in explosion proof ventilation fan ideal for areas where flammable gases, vapors, or finely pulverized dusts may exist. The EPF-HPSM-24-480V high-pressure explosion proof ventilation fan from Larson Electronics features three spark resistant cast aluminum blades that move stale air at a rate of up to 6,860 cubic ft per minute. The frame is made of heavy duty 14-gauge steel that is completely arc welded with tubular supports. This unit is rated for use in Class 1 Group D and Class II Groups F and G hazardous areas.
Howden American Fan Company has introduced its new ventilation concept for underground parking garages, which includes two alternative options — the Jet Thrust Fan and the Induction Thrust Fan. The company says the new system lowers the required parking garage height by about 4 ft, reducing excavation and cement costs and lowering overall construction costs.
A few months ago, this column covered the basics of developing effective control system sequences. You might recall that it discussed the process of how a designer needs to select and describe sequences that provided safe, reliable, and efficient control.
Why was one floor’s laboratory ventilation failing to keep up, when it was even the closest floor to the rooftop fans? Some system sleuthing led two engineers to a fitting conclusion. Read more stories in May Issue 2017.