Question

in designing natural ventilation for a bedroom, which nbcp provision applies? window openings must be at least 10% of the floor area of the room served. nbcp allows mechanical exhaust in lieu of window openings for all bedrooms. only rooms above 12 sqm require natural ventilation. vents must occupy 20% of the gross window area if facing interior walls.

Explanation:

In natural ventilation design for bedrooms, a common provision is that window openings must be a certain percentage of the floor - area. NBCP (National Building Code of the Philippines) typically requires window openings to be at least 10% of the floor area of the room served for proper natural ventilation. Mechanical exhaust is not a substitute for window openings for all bedrooms as per NBCP for natural ventilation purposes. There is no such rule that only rooms above 12 sqm require natural ventilation, and the 20% vent - to - window area rule for interior - facing walls is not a standard NBCP natural ventilation provision for bedrooms.

Answer:

Window openings must be at least 10% of the floor area of the room served.