Outdoor Air Unit (OAU) is an essential piece of equipment for any commercial, industrial or residential property. It provides vital ventilation and air circulation throughout the premises, helping to ensure your safety and comfort. But what is an OAU, exactly? And how does it work? This guide will reveal the official business definition of an OAU and explain its various functions, benefits and drawbacks. With this understanding you’ll be able to determine if an OAU is right for your business and keep it running smoothly for years to come.