2025 New York State Mechanical Code

The 2025 Mechanical Code of New York State, effective December 31, 2025, sets standards for the design, installation, and maintenance of HVAC, ventilation, and refrigeration systems. Based on the 2024 IMC with NY-specific amendments, it strengthens requirements for air leakage, system performance, and ventilation. Closely aligned with the Energy Code, it enforces improved efficiency and indoor air quality. It defines ventilation standards for all occupancies, including healthcare and residential spaces, and outlines detailed exhaust system requirements for kitchens and hazardous environments. Essential for engineers, contractors, and inspectors to ensure safe, compliant, and efficient building systems.