Certified Facility Manager (CFM) Practice Exam

What is a primary drawback of utilizing natural light in buildings?

1. It can create a substantial heat gain within a building.

2. It reduces the aesthetic appeal of the interior.

3. It requires extensive window sizing for adequate light.

4. It limits the use of electronic lighting fixtures.

The correct answer is: It can create a substantial heat gain within a building.

Utilizing natural light in buildings can indeed result in substantial heat gain, which is a primary drawback. When sunlight enters a space, it not only illuminates but also adds warmth, particularly during sunny days or in warm climates. This heat gain can lead to increased cooling demands in air-conditioned buildings, which may offset energy savings gained from reducing the use of artificial lighting. Effective management of solar heat gain is essential to maintain comfort levels within indoor environments; otherwise, it can lead to higher operational costs and potential discomfort for occupants. The other options highlight valid considerations but do not encapsulate the primary drawback as clearly as the challenge of heat gain. While window sizing is important for optimizing natural light, it’s not inherently necessary that extensive windows be required for adequate illumination. Aesthetic appeal can vary based on design choices, and many find that natural light enhances rather than detracts from interior spaces. Furthermore, reliance on natural light does not inherently limit the use of electronic lighting; instead, it may reduce the dependency on artificial sources during daytime hours.