HVAC Journeyman Practice Exam 2025 - Free HVAC Practice Questions and Study Guide

Question: 1 / 400

Why must duct sizes adhere to certain standards in HVAC installations?

To avoid aesthetic issues

To ensure proper airflow and efficiency

In HVAC installations, adhering to certain standards for duct sizes is crucial to ensure proper airflow and efficiency. Duct sizes must be calculated accurately to allow the intended volume of air to flow through the system without excessive resistance or turbulence. When ducts are properly sized, the HVAC system can effectively deliver conditioned air throughout the space, maintaining comfort and energy efficiency.

If the ducts are too small, it can lead to increased air velocity, which may cause noise issues and uneven temperature distribution. Conversely, if ducts are oversized, it may result in a loss of air pressure, leading to reduced efficiency and wasting energy. Therefore, following established duct size standards helps optimize the system's performance, ensuring that it operates efficiently and effectively for the space it serves.

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To simplify installation procedures

To accommodate future upgrades

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