Final answer:
Roof assemblies typically do not receive ventilation air through the rake. Ventilation methods such as infiltration, natural, and mechanical ventilation promote air exchange, which is important for maintaining indoor air quality.
Step-by-step explanation:
The question relates to how ventilation air typically enters a roof assembly. While infiltration, natural ventilation, and mechanical ventilation are all methods by which outdoor air enters and leaves a building, the rake is not a common entry point for ventilation air into a roof assembly. Infiltration occurs through openings, joints, and cracks in the building's envelope, which includes walls, floors, ceilings, and around windows and doors. In natural ventilation, air move through opened windows and doors, driven by temperature differences and wind.
On the other hand, mechanical ventilation involves systems with fans and ductwork that actively manage air exchange within the building. The movement of air and the air exchange rate are critical for maintaining indoor air quality. When the air exchange rate is low due to insufficient infiltration, natural ventilation, or mechanical ventilation, indoor pollutant levels can increase. It's important to have a well-designed ventilation system to control humidity and pollutant levels, which can be affected by high temperatures and humidity.