If a vent stack terminates 4 feet from a ventilation grill, what must be done?

In situations where a vent stack terminates a certain distance from a ventilation grill, it's crucial to follow established ventilation codes and standards which dictate the minimum clearances required for effective operation. If a vent stack terminates 4 feet away from a ventilation grill, raising the vent terminal is necessary to ensure that the exhaust gases have sufficient elevation to disperse away from the ventilation grill effectively.

This action helps prevent the re-introduction of exhaust fumes into the building's ventilation system, which can lead to poor air quality or safety hazards. Raising the vent terminal assists in promoting better airflow dynamics, helping to avoid backdrafts and ensuring that the building's ventilation system operates as intended.

It is essential to adhere to these guidelines to maintain both safety and efficiency within the HVAC systems.