Hi RichinTN,
We appreciate your question about the types of ventilation the microwave can be configured as well as the fan speeds.
The microwave can be configured to vent in 1 of 3 ways.
a. Outside top exhaust (vertical duct)
b. Recirculating (non-vented ductless)
c. Outside back exhaust (horizontal duct)
Please refer to pages 12 - 15 of the installation manual I have shared exhaust configuration.
https://downloadcenter.samsung.com/content/EM/202202/20220223181502042/Install_ME11A7510DS_AA_DE68-04709A-01_EN-MES_220120.pdf
The microwave has 4-speed types. They are Boost, High, Medium, and Low.
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
When you message us, provide them this number 1144919084 and it will help our team pull up your information.
Leo