What does economizer mode in an HVAC system do?

Economizer mode in an HVAC system is designed to optimize energy efficiency by taking advantage of favorable outdoor conditions to cool the interior spaces without relying heavily on mechanical cooling. When the outdoor air temperature and humidity levels are low enough to provide acceptable indoor conditions, the economizer allows for the intake of outside air. This process is referred to as "free cooling," where the cooling load is met by introducing cooler outside air instead of activating the air conditioning system.

This mode can significantly reduce energy consumption and operational costs, especially during transitional seasons when outdoor temperatures are conducive to cooling. Utilizing outside air helps maintain comfortable indoor temperatures while minimizing the dependence on refrigerants and mechanical systems for cooling.