What is the industry standard for deep vacuum in HVAC systems?

The industry standard for deep vacuum in HVAC systems is typically considered to be 500 microns. Achieving this level of vacuum is crucial for removing moisture and contaminants from the system, which can adversely affect performance and efficiency. A deep vacuum ensures that the refrigerant can circulate properly without the presence of air or moisture that can lead to issues such as acid formation in the refrigerant, which can corrode components over time.

Maintaining the vacuum for a specified period, such as 15 minutes, allows technicians to confirm that the system is not leaking and that the vacuum holds steady, indicating that no air or moisture is entering. This practice is a critical step in preparing HVAC systems for refrigerant charging and ensures optimal performance once the system is operational.