i use computer fans.....i know you said ready out of the box but these are so ueasy to wire.....you take a cell phone charger or dc charger hook up the wires until it runs.........DONE..I have two fans running off one DC charger and it works perfectly....perfect amount of intake and exhaust for my grow box..

also they run so quiet i barely here them at all if you stand perfectly still and dont breath you can here from about 4 ft away.....past that its stealth.