Air conditioners and evaporative coolers provide climate control to keep people comfortable in industrial, commercial, and residential buildings. Air conditioners (also called AC units) use refrigerant to condition the air and are typically used for cooling and dehumidifying hot, humid environments. They include units for cooling only and units with a heat pump for cooling and heating. Evaporative and misting coolers use water to cool and humidify the air in hot, dry environments. Air conditioning accessories are tools, chemicals, and equipment for maintaining, installing, and controlling air conditioners and evaporative coolers. They're used for applications such as providing a stable mount, controlling system operations, recharging refrigerant, managing condensate and runoff, and replacing worn or broken components.