About this 3D model

I'm a newbie, and I saw some friends in the group doing the same thing as me. So I wanted to share what I made, in case someone needs it. This is an exhaust device, and it has two parts. A 80*80*38mm fan is embedded in the middle, and two 80mm exhaust pipes are connected at both ends. The main purpose is to exhaust the waste gas produced during printing. Because I am a working person who rents a single room and prints on the windowsill. Under such conditions, I still care about my health. So I came up with some ideas. I have printed the model myself and the effect is OK. It's quite simple. If any big shots can optimize it, it would be even better