Every dwelling shall be so constructed and arranged as to provide adequate light and ventilation as provided under Section 805 to Section 811, of this Code.

Every dwelling shall be provided with at least one sanitary toilet and adequate washing and drainage facilities.

Footings shall be of sufficient size and strength to support the load of the dwelling and shall be at least 250 millimeters thick and 600 millimeters below the surface of the ground.

The dimensions of wooden posts shall be those found in Table 708-A: Dimensions of Wooden Posts (Annex B-1). Each post shall be anchored to such footing by straps and bolts of adequate size.

The live load of the first floor shall be at least 200 kilograms per square meter and for the second floor, at least 150 kilograms per square meter.

The wind load for roofs shall be at least 120 kilograms per square meter for vertical projection.

Stairs shall be at least 750 millimeters in clear width, with a rise of 200 millimeters and a minimum run of 200 millimeters.

There shall be at least one entrance and another one for exit.

Habitable rooms provided with artificial ventilation shall have ceiling heights not less than 2.40 meters measured from the floor to the ceiling; Provided that for buildings of more than one storey, the minimum ceiling height of the first storey shall be 2.70 meters and that for the second storey 2.40 meters and succeeding storeys shall have an unobstructed typical head-room clearance of not less than 2.10 meters above the finished floor.

Above stated rooms with a natural ventilation shall have ceiling heights not less than 2.70 meters.

Mezzanine floors shall have a clear ceiling height not less than 1.80 meters above and below it.

Minimum sizes of rooms and their least horizontal dimensions shall be as follows: Rooms for Human Habitations – 6.00 square meters with a least dimension of 2.00 meters; Kitchens – 3.0 square meters with a least dimension of 1.50 meters; Bath and toilet – 1.20 square meters with a least dimension of 0.90 meter.

Minimum air space shall be provided as follows: 1. School Rooms – 3.00 cubic meters with 1.00 square meter of floor area per person; 2. Workshops, Factories, and Offices – 12.00 cubic meters of air space per person; 3. Habitable rooms – 14.00 cubic meters of air space per person.

Suppose a bedroom has a dimension of 3m x 4m with a ceiling height of 2.70 meters. Determine the number of persons allowed in the room based on the air space requirements of the NBCP.

Every room intended for any use, not provided with artificial ventilation system as herein specified in this Code, shall be provided with a window or windows with a total free area of openings and equal to at least ten percent of the floor area of room, and such window shall open directly to a court, yard, public street or alley, or open water courses.

A residential bedroom has a floor area of 12 square meters. What is the minimum required window area for this bedroom?