This is a 36 inch whole house fan that mounts in your attic so you can't see it and you barely hear it. It starts with the noisy ceiling mounted fan and is improved by the addition of a collector box that enables multiple 20 inch ducts to be connected to hallways and bedrooms for super quiet air flow. 9,700 CFM will move all the air in a 2000 square foot home in under 2 minutes! It comes with 4 duct connectors, 40 feet of flexible duct, 4 dampers for mounting right over the ceiling openings and 4 grilles to cover the openings in the ceiling. And since the motor has infinitely variable speeds it comes with a dial for speed control and a standard shipping price of $180.