Should supply fans be positioned near doors?

• A. True
• B. False
• C. Only in specific cases
• D. Only for larger buildings

Answer: (B)

Positioning supply fans near doors is generally not advisable because it can create various airflow and comfort issues. When supply fans are located close to entry points, they may directly introduce outside air into the HVAC system, leading to an imbalance in the desired indoor environment. This can result in drafts, uneven temperature distribution, and discomfort for occupants within the space.

Additionally, having fans near doors can allow dust, moisture, and contaminants from outside to enter the building more easily. These factors can impact indoor air quality and system efficiency, leading to higher energy consumption and potential wear on the HVAC equipment.

In designing HVAC layouts, it is important to ensure that supply fans are positioned in ways that promote efficient circulation without adversely affecting the building's interior climate or air quality, hence the reasoning for this answer.