30 The NPM suggests that the lack of financial resources cannot be accepted as an excuse for bad housing conditions of detained persons since the placement of persons deprived of their liberty in such inadequate condition areas92 may constitute abuse. Ten recommendations are related to the closure of existing facilities for police detention for being unusable not meeting the minimum applicable standards regarding the necessary housing conditions and 39 recommendations related to adaptation and adjustment to the current standards. Detention facilities in most police stations are located mainly on the ground floor or basement of the police building or in the special facilities in the yards which mostly do not fulfil the requirements for placement of brought in and detained persons. A large number of observed irregularities related to the material living conditions are associated to the lack of natural and artificial illumination and insufficient ventilation of rooms. The windows in most of the rooms are small, mostly covered with perforated metal plates so that the flow of natural light is almost impossible whereas the windows are not usually open resulting in inadequate supply of fresh air. In most cases detention facilities are provided with one bulb, protected with perforated metal panels which do not allow sufficient flow of light, while some premises are illuminated with light coming from the hallway. Hygiene of the majority of the rooms, as well the hygiene of bedding and blankets is not at a satisfactory level. In most cases detention facilities are either not provided with heating, or such heating is insufficient, so that certain detention facilities are not used in the winter period precisely because of the inadequate heating. Hygiene of the sanitary facilities is not at a satisfactory level either, most of them being in very poor conditions. A certain number of the detention facilities, situated far away from the duty service, are not provided with the system of calling police officers on duty (alarm button). Due to the lack of appropriate facilities, detained persons are sometimes placed in the offices or transported to other police stations within the same Police Directorate, which represents a violation of the rights of detainees and hinders the work of police officers. Detention facilities should be large enough, to have a minimum of 7 square meters93; they must be clean, dry, and ventilated, they must be provided with both natural and artificial light, heated according to climatic conditions, equipped with a bed, a matress and a sufficient number of blankets; there should be an alarm button to enable contact with guards and video /audio surveillance control94; there should be no elements that may be used for self-harm in the normal course of events; detainees should be granted unlimited access of drinking water as well as running water necessary for maintenance of hygiene at all times, toiletries and sanitary ware; it is also necessary to provide space for spending time in the fresh air within police stations. None of the visited police stations which enforce detention measures that exceed 24 hours possesses a space for spending time in the fresh air, so that arrested or detained persons usually spend all the time during the detention indoors. 92 Inadequate premises are considered areas that are not in compliance with applicable standards. 93 According to the existing standards, police detention premises should have 7 square meters if intended to accommodate one person only or at least 4 square meters per person if ment to accommodate more persons; distance between the walls of the room should be at least 2 meters, height from the floor to the ceiling at least 2.5 meters, and if they are smaller size they may be used only for stays no longer than a few hours. 94 Being mindful not to violate the privacy of the detainees.