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ARE ALL COPPUS VENTILATORS UL LISTED?
All electrical components (motors, starters, switches, junction boxes, cord, plugs, etc.) are UL listed.
WHAT TYPE OF VENTILATOR DO YOU RECOMMEND FOR EXPLOSION-PROOF ENVIRONMENTS?
If compressed air is available as your utility, we recommend our RF series ventilators or our Jectair (venturi style) air movers.
Pneumatic-drive ventilators are often desirable for hazardous locations. If electric drive is preferred or required, we offer most of our
fans and ventilators in explosion-proof models. Explosion-proof units require all electrical connections to be enclosed, and
moving mechanical pieces to be constructed of material so as not to create sparks. This requires special motors and starters, as well as
fan blades and other moving parts to be made of non-sparking materials such as aluminum, stainless steel, fiberglass or plastic.
WHY ARE PLUGS NOT STANDARD ON EXPLOSION-PROOF UNITS?
Local electrical codes can vary for hazardous location equipment operation, creating a variety of different plug-receptacle
configurations. We recommend that either the plug be installed by a local electrician, or the type and part number of the correct
plug be submitted to us in writing for factory installation to ensure local code compliance.
WHAT IS THE MAXIMUM HORSEPOWER I CAN USE WITH 115V POWER?
A 1.5 HP motor is the largest practical power unit to effectively run on single-phase power. A larger HP motor will generate very large current in-rushes, tripping the electrical protection breaker.
IS THERE A DIFFERENCE IN AIR VOLUME ON THE SUCTION AND DISCHARGE OF THE VENTILATOR?
No. The given air volume is the same whether the ventilator is used as an exhauster or blower. However, there is a significant
difference in the air velocity at a given distance away from the fan. For example: one foot (305 mm) away from the suction end of a
12” (305 mm) fan, the air velocity will drop by 90 percent compared to only a three percent drop on the supply side.
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