Originally Posted by TRRed

Because of the HVAC system in many Marriott properties, they likely would need to designate rooms with balconies on certain side(s) of the building as smoking-permitted balconies and rooms on other side(s) as non-smoking balconies... Finally, since the air system used in many properties often pulls in external air, the res system would also need to permit people to select rooms away from smoking balconies.