How Leader PPV Fans Work
“Hybrid” impeller design
Precisely engineered impellers for each high-tech engine used by Leader ventilators. An impeller that sits between traditional impellers using longer, narrower blades to produce the conventional “cone-of-air” and the turbo fins of recent years. The Leader impeller moves more air with more pressure with each revolution!
No gears or belt drives that wear with time and require continuous maintenance. AND, that draw power from the engine – power saved that can be used to move air!
Impellers are strong, but lightweight, requiring less power from the engine to turn the impeller – extra power saved and used to move more air!
Extensive R&D assures that every impeller set matches the exact torque curve of its respective engine.
Maximum engine and impeller RPM that produces more air is achieved without overworking the engine – overworked engines is caused by impellers that are too heavy or belts, pulleys and gears shown to produce higher outputs of Carbon Monoxide and result in reduced fuel economy.
Engineered shroud
The shroud encircles the ventilators impellers not only protecting the blades but also “influencing” the air flow.
“Air Straightners”
Similar to water stream straightners – used for years in the fire service – they keep the air flow in a straight path or stream off the face of the impellers.
- Delays “equalization” of air pressure off the impellers out to the atmospheric air pressure
- Reduces turbulent air which slows air flow RPM quickly.
Guard Grills of Flat Metal
Rather than guard grills made of round wire as on conventional fans and blowers – flat metal helps to further shape the air flow once it passes off the impellers through the air stream straightners.
“Straight Stream Air Flow Technology”
Known throughout the world as “Easy Pow’Air Technology” – this advanced technology is the result of the combination of the advanced engineering described herein and other factors and produces:
- Exceptionally high air volume (CFM) off the face of the impeller and therefore off the face of the ventilator.
- Extreme air volume efficiency – Almost all the “stream” of air from the face of the Leader ventilator enters the structure to be ventilated while over 1/3 of the air off the face of conventional cone-of-air fans strikes the outside of the generally, rectangular-shaped entry port and is “blocked” from entering the structure.
- Greater air flow velocity (MPH) – Faster air flow allows the stream-of-air from the ventilator to “entrain” even more air and carry that entrained air into the structure – more air in the front, means more air out the back as documented by Leader tests of its ventilators to AMCA-240-96R test standards.
- Higher PPV Pressures – Third party tests of Leader ventilators for pressurizing stairwells and hallways to prevent smoke and heat and even fire from progressing into unaffected areas of the halls and stairwells has shown Leader Straight Stream Air Flow Technology to be mush more effective than larger fans using conventional technology.
(Click here for the results of third-party engineered pressure tests.)
