Day lighting:
To ensure connectivity between the interior and the exterior environment, by providing good daylighting:
- Achieve a minimum glazing factor of 2% in each of the living spaces. 50% of the total floor area of all regularly occupied spaces which include kitchens, living rooms, bed rooms, dining rooms and study rooms. Average glazing factor can be calculated using the formula given below: Glazing Factor = Window Area (SF) / Floor Area (SF) x Actual Visible transmittance x Constant
Constant Values:
- Windows on wall : 0.2
- Window on roof (skylight) : 1.0
Note:
For living spaces which are large in size, part of the areas which have access to daylighting can be factored in the calculation. Living spaces which are used for multi-purposes such as dining and drawing can be considered as separate spaces based on the function. The separating boundary need not be a physical boundary.
Fresh Air Ventilation:
To avoid indoor pollutants affecting indoor air quality by providing adequate outdoor air ventilation. Install openable windows or doors in living spaces, kitchens and bathrooms such that the openable area is designed to meet the criteria as outlined in the table below: Design Criteria for Openable Windows and Doors