I just wanted to let you know that my PQFan has more than 60,000 hours on it and it is still just as quiet and going strong as it was the day I bought it more than 7 years ago.
asimpleman1973 If you have the room, I would go with the AcInfinityInc Filter Box.
Use Code TheHobbyistMiner for 15% at Checkout.
If your limited on space like me, I went with the Fantech Unit
Goodluck!