Velux Aircon Exhaust Adapter remixed noise reduction

basically just a simple modification of the very excelent model provided by Neil, basically smoothing it out to reduce noise. Unfortunately i wasnt able to change the dimensions to mke input and output surface equal, the exhaust side needs to be far wider. The flow would also be a lot better if the raduction surfac would stretch out a bit more and the insides wouldn't be square but round. I wans't able to do these with the given model unfortunately.