A:Answer Hi Mark.
Thank you for reaching out regarding your Samsung 36" Range Hood with WiFi and Bluetooth dimension of the top hood. Regarding your concern, here are the dimension:
A. 6" (15.2 cm) round vent
B. 6" (15.2 cm) round transition
I recommend you check this link for further assistance.
https://image-us.samsung.com/SamsungUS/home/home-appliances/cooktops-and-hoods/hoods/03272018/NK30N7000US_V2.pdf
Should you need more assistance, please feel free to get back to us via the following options:
1. Facebook Messenger: http://m.me/samsungsupport
2. Twitter: https://twitter.com/messages/compose?recipient_id=18768513
3. Samsung Community: https://us.community.samsung.com/t5/Samsung-Community/ct-p/us
Thank you for being a valued customer of Samsung. Have a great day.
Reference Ticket Number: 1144219791
^Camille
