COMPRESSED AIR OR SATURATED STEAM IS THE POWER SOURCE FOR OUR VENTURI BLOWER LINE. SMALL VOLUMES OF HIGH VELOCITY AIR (FROM THE COMPRESSED AIR SOURCE) RUN THROUGH THE CASTING AND OUT THE NOZZLE JETS CREATING A VENTURI ACTION OR PULLING ACTION THAT CREATES LARGE VOLUMES OF AIR THROUGH THE VENTURI AND OUT THE AIR DIFFUSER. THE PRODUCT HAS A LIMITED WARRANTY OF 1 YEAR.