When can range and cooktop clearance be less than the normal requirement?

The correct answer focuses on the concept of manufacturer specifications. When an appliance is labeled and listed, it means that it complies with specific safety and performance standards. Manufacturers often conduct rigorous testing to determine the appropriate clearances for their products under various conditions. If the manufacturer's guidelines indicate that a reduced clearance is acceptable, then it can be adhered to without compromising safety.

This is crucial in ensuring that installations not only meet code requirements but also maintain the integrity of the appliance's function and safety features. Following these manufacturer-recommended clearances can help accommodate unique installation situations, such as when space is limited, without risking safety or performance issues.

Local codes and custom-built cabinets may also play a role in determining clearance, but they typically reference the manufacturer’s specifications. Therefore, without the manufacturer's approval, any alteration to the standard clearance requirements may not be valid under normal guidelines.