Humber/Ontario Real Estate Course 4 Exam Practice

What would be the primary reason for ventilation systems in a house's attic according to building codes?

1. Control temperature variations

2. Provide additional light

3. Improve aesthetic appeal

4. Enhance sound insulation

5. Increase resale value

6. Facilitate electrical wiring

The correct answer is: Control temperature variations

The primary reason for ventilation systems in a house's attic, as dictated by building codes, is to control temperature variations. Proper attic ventilation serves several essential purposes that contribute to the overall efficiency and longevity of the home. When an attic is properly ventilated, it helps to regulate the temperature by allowing hot air to escape during warmer months and by preventing moisture buildup during cooler periods. This control of temperature and humidity is crucial because excessive heat can lead to increased cooling costs, while excess moisture can cause issues such as mold and rot, damaging the structural integrity of the roof and associated components. The other options, while they may have some indirect relationships with attic ventilation, do not address the core requirement set forth in building codes. For instance, providing additional light is not a function of ventilation systems, as they are primarily designed for air exchange rather than illumination. Aesthetic appeal and resale value may be enhanced through other home improvements but are not the focus of attic ventilation. Sound insulation pertains more to wall construction and materials than to the ventilation of an attic. Lastly, while facilitation of electrical wiring is important, it is a separate consideration unrelated to why ventilation systems are mandated in the attic.