What must be done to the air inlet of a vented wall furnace to ensure safety?

Ensuring that the air inlet of a vented wall furnace is not obstructed is critical for safety because adequate airflow is essential for the proper operation of the furnace. If the air inlet is obstructed, it can lead to inadequate combustion air, potentially resulting in improper combustion, which can generate dangerous conditions such as carbon monoxide build-up in the living space.

Maintaining a clear air inlet allows the furnace to operate efficiently and safely, providing necessary fresh air for combustion and preventing overheating or malfunction. This practice aligns with the guidelines outlined in mechanical codes that emphasize safety and efficiency in heating appliances. By adhering to this requirement, the overall safety of the installation can be significantly enhanced, protecting occupants from hazardous situations associated with heating systems.