Semiconductor Heater HG140 12-30 V AC/DC, 15W SIVACON 8MF/8MR system air-conditioning - for air-conditioning in the cabinet. Meeting meet specific system air-conditioning requirements. SIVACON 8MR ensures the error-free operation of the electrical and electronic devices fitted in the cabinet even in adverse ambient conditions. It prevents condensation and frost damage, for example, and protects devices from the potential resulting malfunctions. The portfolio ranges from filter fans and cooling and heating units to thermostats. Alternatively, ventilated cabinets with which system air conditioning is ensured by natural convection can be used in equipment rooms. www.siemens.de/sivacon-8mf. Siemens offers a comprehensive portfolio of protection, switching, measuring and monitoring devices, distribution systems as well as switches and sockets for safe and efficient electrical infrastructure in buildings and industry.