I know the entire first and second floors are non-smoking. I like the second floor rooms close to the lobby--you can take the stairs right up and be at your room in the time it takes to wait for the elevator.
Unless they changed their smoking policy BC has smoking rooms on the second floor. At check-in last year we were taken to a 2nd floor room which smelled of smoke. We asked to be moved immediately. ( I have a DS with asthma )