What is a common device used to provide tempered fresh air in certain areas of a school?

• A. Windows fan
• B. Air conditioner
• C. Exhaust fan
• D. HVAC system

Answer: (A)

A windows fan is a device that can help with providing tempered fresh air, particularly by drawing in outside air and potentially circulating it throughout a room. In certain contexts, such as specific areas of a school where natural ventilation is sought or where power considerations might limit the use of larger systems, a windows fan can effectively control air flow. It allows for some degree of temperature regulation as it can be adjusted based on outdoor conditions.

While an air conditioner can also temper air, it functions primarily to cool or heat indoor air rather than specifically introducing fresh air from outside. An exhaust fan is designed to remove air from a space, rather than bring in fresh air. An HVAC system is a more comprehensive solution that manages heating, ventilation, and air conditioning, typically providing more controlled indoor environments but is often larger in scale and complexity. In specific applications where simple ventilation is desired and cost or space constraints exist, a windows fan is an accessible and practical choice.