... pad, it is cooled by evaporation.The key to effective evaporative cooling is ensuring that each of ... and designed to deliver the appropriate air flow for the house. Properly designed, a cooler will lightly pressurize ... house with cool fresh air. The cooling will go to the areas where you ventilate, such as open ... warranty for 1year,if any parts damaged,we will offer free,clients take shipping fee,this won ...