What type of ventilation system is NCMC 514.2 considering when discussing energy recovery limitations?

The North Carolina Mechanical Code (NCMC) Section 514.2 focuses on energy recovery ventilation systems, particularly in commercial applications. When discussing energy recovery limitations, the reference is specifically aimed at commercial exhaust systems because these systems can significantly impact energy efficiency and indoor air quality.

Energy recovery ventilators (ERVs) are particularly beneficial in commercial settings, where they can reclaim and reuse energy from exhaust air to precondition incoming fresh air. This is especially important in commercial exhaust scenarios where large volumes of air are moved, which can lead to substantial energy losses if not managed properly. By effectively implementing energy recovery measures in these systems, buildings can reduce their overall energy consumption while maintaining optimal indoor conditions.

In contrast, central air systems and radiant heating generally pertain to different aspects of HVAC design and operation, focusing more on the distribution of heated or cooled air rather than the specific energy recovery from exhaust situations. The choice of 'N/A' does not reflect a relevant option within the context of energy recovery discussions in the code. Thus, understanding the distinct role of commercial exhaust systems in energy recovery is crucial for ensuring compliance with NCMC standards and optimizing energy use in mechanical ventilation systems.