Cyco, I think we agree, then. I was just afraid that he'd be like many people out there who buy a 235CFM fan and then NEVER run it at full voltage! If you only want a maximum of 30CFM, buy a fan that is designed to move 30CFM. If you think you might want to move 235CFM sometime, don't be ashamed... go for the gusto! I know that pHaestus isn't ashamed of his 235CFM Rotron.
"More power Scotty!" - a man who likes pushing his hardware to the limit. Damn the warranties, full speed ahead!