Which kitchen exhaust systems are specified to be prohibited from energy recovery ventilation systems?

The specified kitchen exhaust systems that are prohibited from energy recovery ventilation systems are Type I and Type II. Type I systems are typically used for cooking appliances that produce grease-laden vapors, such as fryers and grills, while Type II systems are designed for ventilating moisture-laden air, typically associated with non-grease cooking processes.

The prohibition for these types of systems from energy recovery is primarily due to health and safety concerns. Specifically, grease from Type I systems can pose fire hazards, and the introduction of air that has been treated with energy recovery systems can increase the risk of grease buildup or contamination. Moreover, Type II systems, while not as heavily laden with grease, still involve humidity that could pose challenges to effective energy recovery without compromising air quality.

In contrast, the other system types presented—Type III and IV, residential and commercial, gas and electric—do not share the same prohibitions regarding energy recovery ventilation systems, as they either do not carry the same level of contaminants or are designed for different applications that allow for energy recovery.