Keep that Antminer running cooler for longer life of the components - protect your investment that is making you money!
A great setup would be to connect a standard dryer hose, Duct Stat Fan Thermostat and a duct fan duct fan. If you have more than one Antminer then you could purchase a Y-connector and tie several ducts together.
Use the existing screws in your Antminer to connect.
This duct can be used on any standard 120MM Fan!