BHeng's (90043-CR) Vortex Fan Replacement Kit ReviewbP PP Heng's (90043-CR) Vortex Fan Replacement Kit PDon't just move air; 7 inch height x 17 inch Width x 17 inch lengthPCreate a Vortex Update your old; Single Speed with 9 Inch bladePInefficient powered vent easily without replacing the entire vent or compromising the rooftop sealPJust replace your existing screen with the Vortex upgrade kitPMake your outdated vent more powerful without buying a whole new and expensive ventP