CSLB Class B General Contractor's License Practice Exam

What is a common method of minimizing energy loss in HVAC systems?

1. Using larger ducts

2. Routing ducts within conditioned spaces

3. Increasing insulation thickness

4. Decreasing airflow

The correct answer is: Routing ducts within conditioned spaces

Routing ducts within conditioned spaces is an effective strategy for minimizing energy loss in HVAC systems. When ducts are placed in areas that are already heated or cooled, such as living spaces, they are less susceptible to temperature extremes found in unconditioned areas like attics or basements. This results in reduced energy loss due to heat transfer, as the air within the ducts remains at a more consistent temperature, leading to improved overall efficiency of the HVAC system. In contrast, options like using larger ducts or increasing insulation thickness address airflow or thermal protection but may not specifically direct the management of duct temperature and associated energy efficiency in the same direct manner. Decreasing airflow can negatively affect system performance by making it harder to maintain desired indoor temperature and air quality, which could ultimately lead to higher energy consumption. Thus, routing ducts within conditioned spaces stands out as a practical and effective solution to optimize energy use in HVAC installations.