How far shall the vent terminate above insulation?

The requirement for vent termination above insulation is specified for safety and effective venting performance. A termination height of no less than 2 inches above insulation ensures that the vent can adequately discharge gases without obstruction from surrounding materials, which is crucial for both preventing buildup in the vent system and maintaining proper ventilation. This mandated height helps to minimize potential hazards such as backdrafting or overheating, which could lead to unsafe conditions within a structure.

Higher or lower termination points may not provide sufficient clearance to account for shifts in building materials, possible settling, or other environmental conditions that could impact the vent's performance. Therefore, ensuring a minimum of 2 inches above any insulation is a critical practice in building codes and regulations for venting systems.