In the process of building my grow cabinet as we speak. It is going to be 7 ft high 5 ft wide and 3ft deep and will be in the basement. It will be a hydroponic system with an air cooled hps light. Beyond that I have no idea what else it is i need. I do know I need an exhaust fan and thats where i need your expertise. I want something that is not to noisy as this will be right below my living room. What kind of fans should I get and what size and cfm should I get? I rather be safe than sorry when it comes to the size of my fans. i want to go bigger rather than smaller as I do not want to have to buy another one if it is not enough power. Will just a pvc elbow be enough for my intake or do I need fans for that also. Keep in mind i will also want some kind of odor control also. If you guys could give me some ideas in these areas it would be GREATLY appreciated. I am so confused when it comes to all the choices of fans and the sizes available. Ventilation is where I need some guidance. Thanks to all for reading my post and for any help you can give.