The definition of an exhaust as a supply is a system that is used to expel unwanted air, gas, or vapor from a confined space. It is typically used in industrial and commercial settings to ensure the safety of workers and customers. Exhaust systems can be found in a variety of applications, such as in manufacturing plants, factories, warehouses, and other areas where hazardous materials are present. Exhaust systems are designed to remove harmful substances from the air, such as dust, smoke, fumes, and other airborne particles. The exhaust system also helps to reduce the amount of noise that is produced by the machinery and equipment in the area. In addition, the exhaust system helps to reduce the amount of heat and humidity in the area, making it more comfortable for workers and customers. The exhaust system also helps to reduce the amount of energy used by the machinery and equipment, helping to save money on energy costs.