Certified Energy Auditor Practice Exam 2025 – All-in-One Resource to Achieve Exam Success!

Preheating ventilation air in buildings is primarily aimed at warming cold outside air before it enters the building. This process is crucial during colder months when the outside air can be significantly lower in temperature compared to the indoor environment. By preheating the air, the building's heating system does not have to work as hard to bring the indoor temperature to a comfortable level. This enhances energy efficiency, reduces heating costs, and aids in maintaining a stable interior climate.

When the outdoor air is preheated, it not only helps to maintain comfort levels for occupants but also minimizes the potential for drafts and creates a more even distribution of temperature throughout the space. This is especially significant in larger buildings where temperature control is essential for both comfort and energy management. Thus, preheating serves a functional role in enhancing the efficiency and effectiveness of a building's heating system.