This is a smoking allowed place, if you are not a smoker don't rent here as it will be horrible with the scent and ventilation. This is indicated as the last item in the Air B&B aminities so it is easy to miss.
Beaware that the location is not on the main street of the Osmanbey Station exit, it is in the backstreet with a horrible view. The Air B&B map doesn't show that in the intital map until you make the booking.
Finally, The rooms, sheets and bedding weren't appropriately cleaned in my case, despite Air B&B saying this place takes the enhanced cleaning measures, yet it looks they skip the very basic ones.