This is a 30 inch whole house fan that 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.

7,600 CFM will move all the air in a 2000 square foot home in just over 2 minutes!
It comes with 4 duct connectors, 4 10 foot ducts, 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 $185.