quietest fan?

I am about to set up a ventalation system for my closet and I need a realy silent fan.

Any one have a recomendation on a decent priced silent fan for ventilation?

I am using 2 fans

1 fan to blow hot air in to my attack and another taking fresh air from outside

I plan on using duct muflers but I am not sure how well the work. I know that blowers are louder then muffin fans but I dont want to blow all of my budget on a fan.

The space is 2 x 5 x 7 so I need roughly 350cfm to move all the air in the room every minute.

WhisperLine Inlineâ?¢ | iaqsource.com - Aprilaire, Honeywell, Trion Air Bear, Bryant, Carrier, Trane Filters and IAQ products

these are the quietest fans i have seen, look at the sones rating compare to others

ive heard people gettin them and say their awesome

im bout to get one in a few weeks