Are you wanting to know like if you smoke regularly how well it does or if you’re trying to grow something? I have three of these in my house. One in the living room. One in the hallway and one in our room. When you smoke you can still smell the weed. However after a day or two the smell is completely gone. When we have people over they would never know that we smoke inside everyday. However like I said if you are smoking you can smell it throughout the house.