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FAQ: CARBON MONOXIDE (CO)
VENTRY Fans have low CO levels, especially compared to other PPV Fans
CO does not accumulate if the air is flowing well and you are moving a lot of it. Note: you must have an adequate exit for the air flow as well as sufficient input. The low CO levels on VENTRY gas fans are a testament to their efficiency.
We use the same Honda engines on our gas fans as other fan manufacturers, but much smaller models. Our props utilize that horsepower better, producing more air volume with less engine power. Getting higher air volumes using smaller engines means VENTRY Fans produce less carbon monoxide to begin with. This is especially important if you use a PPV Fan for fire fighter rehab.
To realize these efficiencies, VENTRY fans combine several features. First, the tripod leg design allows you to raise the fan off the ground, allowing more air to get to the propeller. Without legs, box fans sit on the ground, and the bottom portion of the prop is partially starved of air. (Always extend the legs on your VENTRY Fan, even if only 6 inches, to prevent the prop starvation situation of leg-less and shrouded fans.)
Second, our propeller design is based on the same technology as aircraft propellers. We produce much more thrust using much less horsepower than conventional blower blades. Recall physics and Newton's Third Law of Motion: for every action there is an equal and opposite reaction. The more thrust we produce (ie the harder the fan is pushing) the more air we are moving (pushing). Our fan blades push the air instead of beating it up! By the way, in addition to reduced CO levels, the ability of VENTRY Fans to produce more air from less engine power also results in less noise, less weight, and less expense! Together, these features create a very versatile fan with many advantages over ground hugger fans with conventional propellers.