Cold halvet (private small room)It is the first entrance section of the hamam, it is not a very hot section. It is the section used to cool off when it becomes uncomfortably hot for you.
Hot section (Inside of hamam) and center stone:This is the section mainly used by tourists. It is the bathing and sweating section. It contains the center stone which is heated from below. You can lie on it and relax.
Hot halvet :Consists of two small rooms. Only used for bathing. Each room has three kurnas (marble tubs in which hot and cold water from two taps are mixed). It is one of the hottest sections.
Kulhan (Furnace):This is the section from which the hamam is heated. The Aga hamam has been heated with traditional methods for years. It is heated by wood fire. Woods are lit in the kulhan section and the heat circulates under the hamam. While many hamams in Istanbul are heated with natural gas, the Aga hamam is heated by wood fire, which allows experiencing a privilege in heat. Heat provided by natural gas can never be the same as that of wood fire.