This international Standard lays down requirements for the design and installation of fixed carbon dioxie fire-extinguish-ing systems for use on premisiss. The requirements are not valid for extinguishing systems on ships, in aircraft, on vehicles and mobile fire appliances or for below ground systems in the mining industry, nor are they valid for carbon dioxide preiner-ting systems. Design of systems where unclosable opening(s) exceed aspecified area and where the opening(s) may be subject to the effect of wind is not specified in this International Standard. General guidance on the procedure to be followed in such cases is, however, given in 15.6.