What is crucial to note about manual dampers in solid fuel-burning appliances?

In the context of solid fuel-burning appliances, it is essential to understand that manual dampers are generally prohibited. This stance is primarily due to safety and efficiency considerations. Manual dampers can pose hazards, as they may inadvertently restrict airflow or be poorly maintained, leading to improper combustion and the accumulation of harmful gases such as carbon monoxide.

Prohibiting manual dampers encourages the use of more reliable systems that automatically regulate airflow and ensure optimal performance of the appliance. This practice aligns with safety standards and codes, which aim to minimize risks associated with solid fuel combustion.

Depending on the specific appliances involved, other options referring to installations of dampers or requirements for efficiency may not align with established codes, which have explicitly ruled against manual dampers in certain situations.