What’s the function of a protective pressure relief vent in a HVAC system

The Critical Role of Pressure Relief Vents in HVAC Systems

• Pressure regulation: Acts as a safety mechanism to release excess air or refrigerant when pressures exceed safe thresholds, preventing damage to coils, compressors, and ductwork.
• Spike protection: Mitigates pressure increases caused by blocked filters, damper failures, or refrigerant overcharging that could lead to pipe bursts or compressor burnout.
• Vacuum prevention: Safeguards against negative pressure conditions in VAV systems or during shutdowns that might collapse ductwork or draw in unconditioned air.
• Automatic operation: Opens at preset pressure levels to divert excess media to safe discharge points, then reseals when normal conditions return.
• Regulatory compliance: Meets building code requirements for pressure relief mechanisms while containing refrigerant leaks away from occupied spaces.
• System longevity: Maintains optimal operating parameters to extend equipment life and ensure consistent HVAC performance.