Tsarin zagayawa na ruwa shine muhimmin tsarin chiller masana'antu, wanda galibi ya ƙunshi famfo, sauyawa mai gudana, firikwensin kwarara, binciken zafin jiki, bawul ɗin solenoid, tacewa, evaporator da sauran abubuwan haɗin gwiwa. Yawan kwarara shine mafi mahimmancin mahimmanci a cikin tsarin ruwa, kuma aikin sa kai tsaye yana rinjayar tasirin firiji da saurin sanyaya.