The recommended amount of natural light for hotel rooms can vary depending on various factors, including location, design, and guest preferences. However, a general guideline is to aim for a minimum of 10-15% of the room area as windows or openings that allow natural light.
In terms of specific measurements, the Illuminating Engineering Society of North America (IESNA) suggests that hotel rooms should have a minimum daylight factor (DF) of 2-3%. The daylight factor represents the ratio of indoor illuminance (light intensity) to the outdoor illuminance. A DF of 2-3% means that indoor illuminance is 2-3% of the outdoor illuminance.
Additionally, some industry standards recommend that hotel rooms should have windows that occupy around 25-30% of the total wall area. This ensures an adequate amount of natural light and provides a pleasing ambiance for guests.
It's important to note that while natural light is generally desirable in hotel rooms, efforts should also be made to include appropriate window treatments such as blinds or curtains to allow guests to control the amount of light entering the room and maintain privacy as needed.
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