On the first floor of the administrative building there are two investigation rooms. These rooms are used for meeting with prisoners not only by representatives of investigative authorities but also by lawyers, priests and representatives of international organizations and the Public Defender’s Office – persons whose conversation with the prisoners is confidential under law. There are a total of 4 investigation rooms. Surveillance cameras are installed in all of the investigation rooms. A majority of the prisoners believes their conversations are audio- and video-taped by the surveillance cameras. This makes the prisoners feel pressured and unwilling to speak up. The investigation rooms are not artificially ventilated. Each room has one PVC window which provides adequate natural ventilation. The investigation rooms are equipped with a central heating system. Both natural and artificial lights are sufficient. 2.4.1.11.  PENITENTIARY INSTITUTION NO. 15 The floor area of the cells in the Institution no. 15 are 12m2, 13m2, 17m2 and 18m2. Each cell is meant to accommodate 6 prisoners. The floor area in the residential cells does not always comply with the requirement under Article 15(2) of the Code of Imprisonment.101 The natural light in the cells is inadequate and an artificial light is always on. The central heating system in the residential buildings does not sufficiently heat the residential cells and the prisoners have to buy electric heaters – which means additional costs for them. Quarantine cells and solitary confinement cells are located in the closed-type residential building. There are 14 solitary confinement cells in total in three of which surveillance cameras are installed. Each cell has an area of 10 square meters. Each cell has one window with iron bars, which is inadequate to properly provide natural light and ventilation. There are 5 quarantine cells in the Institution. Each cell has an area of 22 square meters. There are 5 bunk beds in each cell. Sanitation and hygiene in the cells are inadequate. Each cell has one window, which is not enough to provide natural ventilation. It should be noted that if the cells are used to the full, they will become cramped. Placing several prisoners in one quarantine cells works against the objective of controlling infection in the prisons and may result in spreading infectious diseases amongst the prisoners. There is a sports ground in the exercise yard of the main residential building. Part of the yard (200 square meters) is roofed to keep some sports equipment there. A closed-type building has 4 exercise yards each having an area of 10 square meters. 101 Under Article 15(2) of the Imprisonment Code, the floor area per each convicted prisoner in all types of places of deprivation of liberty should not be less than 4 square meters. NATIONAL PREVENTIVE MECHANISM OF GEORGIA 65