Residential HVAC Installation Practice Exam

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How does the U-value relate to the insulation properties of a material in HVAC systems?

  1. Higher U-value indicates better insulation

  2. Lower U-value indicates better insulation

  3. U-value is not related to insulation

  4. U-value only affects air quality

The correct answer is: Lower U-value indicates better insulation

The U-value, also known as the thermal transmittance, is a measure of how well a building material allows heat to pass through it. In the context of HVAC systems and insulation, a lower U-value indicates better insulation properties. This means that materials with a lower U-value are better at reducing the heat transfer between indoor and outdoor environments, leading to improved energy efficiency and reduced heating and cooling costs. Therefore, in HVAC systems, a lower U-value is desirable as it signifies better insulation performance.

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