Gas Heat ESCO Practice Exam

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Duct wrap is used to insulate round metal ducts. What is the approximate R-value for one inch of this insulation?

R=3.0
R=6.0
R=9.0
R=1.5

The correct answer is: R=3.0

The R-value is a measure of thermal resistance, indicating how well a material insulates. In the case of duct wrap used for insulating round metal ducts, one inch of this insulation typically has an R-value of approximately 3.0. This means that for every inch of duct wrap, the material provides a fair level of resistance against heat flow, enhancing the efficiency of the heating and cooling system by minimizing heat loss or gain through the ducts. Understanding R-values is crucial for selecting appropriate insulation materials for specific applications. The use of duct wrap with an R-value around 3.0 is common practice in HVAC systems to ensure ductwork maintains its intended temperature effectively, ultimately leading to improved energy efficiency and comfort in climate-controlled spaces.