Engineered to give you more cooling power for less money. The Brisa line of evaporative window coolers deliver more CFM (cubic feet per minute of air) for each watt of energy consumed than comparative competitive models. This means quicker cooling as it absorbs heat from the air faster. Nature's most efficient means of cooling is through the evaporation of water. Evaporative cooling works on the principle of heat absorption by moisture evaporation. The evaporative cooler draws exterior air into special pads soaked with water, where the air is cooled by evaporation, then circulated into your space. Brisa can cost between 15% to 28% less to operate and achieve equivalent results. How Brisa Evaporative Coolers are built with materials of the highest quality and are designed to stand the test of time. The exclusive MIRROSCOPIC Blower shaft finish process yields a 90% improvement over the industry standard "ground finish". This means quieter operation as well as longer bearing and shaft life for your cooler.