Quote Originally Posted by Glenn24 View Post


I can't immagine what kind of air the main fan can move !!!

Let's so some quick math here... Let's say you have a 30ft x 30ft, 2 story house + basement. Assuming all floors have 8ft ceilings. That's 30ft x 30ft x 8ft x 3floors = 21600 cubic feet. That would mean you would be able to completely remove & replace the air in your entire home more than twice each minute. That's one heck of a bathroom fan !! I WANT ONE !!! )
Jack tells me the main fans are moving about 350k cfm. I hear a big issue is properly ventilating the working face while keeping the air flow at the entrance slow enough that people can still work. It gets windy in there!