Kuziziritsa kwa evaporative ndikusankha kwabwino kwa ogwiritsa ntchito zachilengedwe omwe amafunikira mphamvu yozizira. Chinyalala champhamvu ichi sichimangodziziritsa chokwanira, chimagwiritsanso ntchito mphamvu zochepa poyerekeza ndi mpweya woyendetsanso mpweya. Chifukwa palibe compressor, kuchuluka kwa mphamvu zomwe zimafunikira pakugwira ntchito ndizochepa. Kugwiritsa ntchito ndikosavuta popeza idapangidwa ndi ma watts a 220.