Hi vshankara,
We are glad to hear that you are interested in our Samsung hood. This product has 390CFM and does not require a makeup air unit, not unless the product has 400CFM and above. You may check the link below for the specification guide.
https://image-us.samsung.com/SamsungUS/home/home-appliances/cooktops-and-hoods/pdf/NK36R5000W_V3.pdf
To know more about the product, you may contact us with 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
4. Phone Customer Care: 1-800-726-7864 (1-800-SAMSUNG)
You may provide this reference number (1144906215) to help our team pull up your information.
Thank you for choosing Samsung. Have a great day.
-Trisha-