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there are energy codes that mandate the use of an airside economizer for HVAC equipment over a certain size an economizer reduces energy consumption by using the outdoor air for cooling in mild or cold weather instead of mechanical cooling well cover how an airside economizer works and show you three different relief air options foreign [Music] izers are used with package units split systems and Air Handlers of all sizes when the outside air temperature is below the return air temperature then outside air can be more energy efficient to use for cooling than mechanical Cooling here is one control layout of many for controlling an economizer we have an economizer controller which can be integrated into the economizer section or as a separate controller next there will be a thermostat in the space and a supply air temperature sensor in the Supply Air discharge duct there is a return air temperature sensor in the return air duct the economizer controller will need a Transformer to provide
