Ruwan sanyaya ruwa yana rufe iyakar ikon da CO₂ Laser zai iya cimma. A cikin ainihin tsari na samarwa, aikin daidaita yanayin zafin ruwa na chiller yawanci ana amfani dashi don kiyaye kayan aikin laser a cikin kewayon zazzabi mai dacewa don tabbatar da ci gaba da kwanciyar hankali na kayan aikin laser.