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FAN FAQ TOPICS:
Why are VENTRY Fans so much quieter than other brands?
At full throttle, we have measured the noise level of our fans to be near 94 dB, (measured from four feet behind the fans). We have received many anecdotal reports as well, that VENTRY Fans are much quieter than other PPV Fans. There are scientific reasons for this having to do with our propeller blades.
It is a fallacy that more propeller blades mean more air. Multiple blades stir the air rather than push it, wasting energy in the form of noise. This is called “form drag” or “eddy making drag” and is due to multiple tips and greater surface area. The propellers on all fans, even VENTRY, make the vast majority of the noise, not the engines! (Note that different brands of PPV Fans vary significantly in how loud they are even though they use the same Honda engines.)
TRUE STORY: We once had a fire department call us and complain that their VENTRY Fan was not working very well. Why did they think that? The VENTRY Fan was not making “enough noise!” They just assumed that to be effective, fans also had to be painfully loud. Not true! Not with VENTRY! |
The argument is often made that a noisy fan can be comforting to firefighters in a structure, helping them stay oriented to the exit. We recommend turning on the VENTRY Fan Safety Light instead. A light at the end of the tunnel, guiding you out of the structure, is much more comforting than a painful racket.
Reduced noise levels are just one of many benefits of VENTRY Safety Propellers. For more about our props, click here.
