Chipinda chozizira chawiri, chomwe chimadziwikanso kuti duplex cold room, chimakhala ndi zosungiramo zozizira ziwiri, zomwe nthawi zambiri zimagwiritsidwa ntchito posungiramo zipatso, ndiwo zamasamba, nyama ndi nsomba.Pogwiritsa ntchito mphamvu zomwezo pansi pa malo omwewo, imatha kukwaniritsa ntchito zosiyanasiyana monga kusunga katundu, katundu wozizira, ndi kusunga zatsopano.