Hello,Thank you for contacting us. Yes, we deal with Green House applications. We actually supply a professor at the Arizona University who swears by them. He says that these are the best for fruiting mushrooms. It typically depends on your ambient humidity and air exchange. I would suggest the 9 or 12 disc model for your application. We also sell waterproof fan kits so you can make an easy DIY humidifier. If you have any other questions feel free to contact us again! Thanks again!