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33%
heavier-gauge housing than competitors' clone models
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Specially-engineered
cone - reduces back pressure and boosts air performance
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Oversized
intake opening - Increases air flow capacity
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Aluminum
shutters - micro balanced to reduce air drag
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Blade
computer matched to tweak-out maximum efficiency
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Exclusive
EZ-swivel shutter fasteners - for quick, tight mounting
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Pulley-diameter/belt-style
combination computer optimized to maximize air flow without overloading
motor
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Housing
extends straight-out, thru wall, for tighter wall seal
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Housing
slopes down, beyond wall, for less air resistance, and to protect
components from weather, plus aid in runoff
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Extra-deep
orifice opening accelerates air flow
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