AmeriFan AIF4 Inline Duct Booster Exhaust Fan， 190 CFM， 4" for Growing， Hydroponics， Heating， Cooling， Venting， HVAC， Steel</br></br><div style="text-align:left"><b>[Product Information]</b><br><ul><li>Industrial grade design and manufacturing means performance and durability: high air flow even against 25 feet of pipe and several elbows. Warrantied by tjernlund products， established 1938</li><li>Cfm per watt (air flow efficiency) meets or exceeds requirements for energy star rating</li><li>Engineered by Fan Experts Based at Tjernlund's Minnesota Factory. Premium Fans Sold Factory Direct--Not Pay and Pray Mystery Fans</li><li>Includes mounting hardware， 6 foot cord， and electrical instructions for integrating any additional controls</li><li>Perfect for heating/air conditioning duct， factory exhaust， grow rooms， greenhouses， hydroponic farming， general factory exhaust or cooling of hot air in buildings and on equipment</li></ul></div></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br><img src='http://ecx.images-amazon.com/images/I/31DDdt9bUcL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/31xWR-l09EL.jpg' noproxy></br><img src='http://ecx.images-amazon.com/images/I/31C8-FTukNL.jpg' noproxy></br>