This study was aimed towards evaluating the air quality in exercise situations with Distraktionshandgranat 13 and the corresponding exercise hand-grenade. The experiments were conducted in triplicates for the two grenades at Markstridsskolan in Kvarn in two different rooms: Room 1 was a regular apartment room with a relatively small area and space for a single bed and some furniture. This room was only equipped with passive ventilation, which means ventilation took place by opening doors and windows in the current and adjacent rooms. Room 2 was a bigger room and better ventilated since the rooms in the facility lacked a roof in a strict sense. The roof of the facility was located about 1.5 - 2 meters above the wall end. There was no ordinary floor since the room was located directly on the ground as a trodden earth floor. Measurements were made of carbon monoxide, nitrogen dioxide, hydrogen cyanide, sulphur dioxide, hydrogen chloride (hydrochloric acid), cyanogen chloride volatile organic compounds (VOC) and dust. The dust was then analysed for inorganic content to get the element composition. The results from the investigations of Distraktionshandgranat 13 in the apartment room (room 1) show that the only combustion gases which were close to their respective occupational threshold limit value (TLV) are carbon monoxide and nitrogen dioxide. During the short exposure times during a working day, the levels are so low that they appear to be safe. The analysis of VOCs in the air gave levels well below the TLV. The element composition of the dust was analysed and the values were below their respective TLVs for the majority of the elements. However, aluminium was found at levels 1.5 times above the TLV and potassium at three times the TLV. The main problem when using the hand-grenade is emission of high levels of dust. The threshold limit value for inhalable inorganic dust is 10 mg/m3, and measurements show levels between 110 ± 5 and 140 ± 9 mg/m3 over a measurement period of 10 minutes from the initiation of the grenade. Such high values requires caution when using the grenade in confined and poorly ventilated areas if respiration protection cannot be used in certain exercise situations. In both rooms, measurements of combustion gases and particles from the exercise handgrenade showed levels below the respective occupational exposure limit values. Furthermore, Distraktionshandgranat 13 combustions gases and particle levels in room 2 were also below the occupational exposure limit values. The use of the grenades under these circumstances does not seem to constitute a health hazard for the concerned personnel.