Delonghis pac ex100 silent air conditioner uses r290 propane gas a natural refrigerant gas which is non toxic eco friendly and energy saving the ex100 is the first delonghi portable air conditioner to reach an a class energy efficiency rating incorporating both silent and real feel delonghi technology which is unique to delonghi used to create a perfect level of comfort attainable from a portable air conditionerthe list of features do not stop there the delonghi ex100 can additio