Kamar sauran kayan aikin masana'antu, na'urar sanyaya ruwa tana buƙatar yin aiki a cikin yanayin aiki mai dacewa. Kuma ta hanyar yanayin aiki, zafin yanayi shine babban abin da ke cikinta. Kamar yadda muka sani, lokacin da zafin yanayi ya faɗi zuwa ko ƙasa da digiri 0 na Celsius, ruwa zai daskare. Amma wannan ba yana nufin zafin ruwa ya fi girma ba, mafi kyau, domin hanyoyin suna buƙatar yanayin zafi daban-daban. Idan zafin ruwa ya yi yawa, za a kunna ƙararrawar zafin ruwa mai matuƙar girma. To menene matsakaicin zafin yanayi na na'urar sanyaya?
To, ya bambanta da nau'ikan na'urorin sanyaya ruwa daban-daban. Ga na'urorin sanyaya ruwa masu sanyaya CW-3000, matsakaicin zafin yanayin na'urar sanyaya ruwa shine digiri 60 na Celsius. Duk da haka, dangane da na'urorin sanyaya ruwa masu aiki (misali, bisa ga sanyaya), matsakaicin zafin yanayin na'urar zai zama digiri 45 na Celsius.
