No biggie... but that is actually minus (?) 14 psi to create a near absolute vacuum... and as long as there is air moving, that will never happen.I made a big mistake and hit me like a ton of bricks it takes a mimimum of 14 PSI to creata vacuum. Sorry about that.
Anyway, that's the major difference between sucking and blowing. At best, you'll only be able to create a maximum 14 psi differential between ends of the conduit... and you'd need a "Super Sucker" to come close to that figure. A blowing system is more than the opposite side of the story. It is easy to create a differential pressure many times that of a vacuum system with nothing more than a basic compressed air system.