What is exhaust air?

The evaporative cooler draws fresh exterior air through special pads soaked with water. The air is cooled, filtered and circulated through the home. The hot, stale air needs to exit and this is referred to as “relief air”. The best “relief” design is to exhaust slightly less air then your cooler is supplying. This will ensure that your home has a slight positive pressure which minimizes dust and heat from entering your home.