What types of cooking appliances require Type I hoods installed above them?

Type I hoods are specifically designed to handle the ventilation needs of cooking appliances that produce grease and smoke, which are commonly associated with heavier cooking processes. Appliances classified as heavy-duty and extra heavy-duty are typically used for intensive cooking operations such as frying, grilling, or other methods that generate significant volumes of grease-laden vapors.

The functionality of Type I hoods is crucial in these environments as they not only provide proper ventilation but also help in maintaining air quality and reducing fire hazards by capturing grease before it vents into the atmosphere. Heavy-duty appliances usually include commercial-grade ranges, fryers, and grills, which demand the more robust capabilities of a Type I hood.

In contrast, lighter duty cooking appliances do not necessitate the same level of hood because they do not produce the same amount of greasy emissions or exhaust. This distinction is significant when determining the correct type of hood needed for different cooking operations, ensuring safety and compliance with mechanical codes.