Security housing having ventilation openings

A security housing, comprising:

• a housing body having ventilation openings formed therein for supplying air to a heat source in an interior of said housing body, in which air convection takes place for dissipating heat from the heat source;
• first air guide elements disposed on an inside of said housing body on at least a first side of each of said ventilation openings and being shaped such that said ventilation openings are at least partly covered, said first air guide elements each having a base integrally molded on said inside of said housing body, said base being spaced apart from each adjacent said base such that, as a result, in each case one of said ventilation openings being further defined;
• a removable security housing part disposed inside said housing body and forms an air guide duct;
• and
• second air guide elements oriented in an interior of said air guide duct and shaped such that said second air guide elements cover said ventilation openings of said housing base and said first guide elements at least to such an extent that, in a region of said first and second air guide elements, non-rectilinear air guidance is ensured.