Air conditioner exhaust into the ventilation window for 100mm duct

I recommend checking out remixes made by @Hanak1nSolo and @fneb
Both are great, and could be a better fit for your specific case! You can find them in Remixes tab

window outlet size is 40mm x 200mm

is has the same area as the input (about 8000mm^2)

inner diameter is 104mm due to my weird duct which i silver taped that i recommend anyway

fusion360 file attached

if you need any other sizes, let me know in a dm or in comments

below is which sketch (the first one) you have to edit to get other diameter