NASCLA Accredited Commercial General ContractorMechanical, Electrical, Plumbing (MEP)Medium
A commercial general contractor is overseeing the installation of a new HVAC system in a multi-story office building. The project specifications require a system that prioritizes energy efficiency and precise temperature control across various zones. Which of the following HVAC system types is best suited to meet these requirements?
- ASingle-zone packaged unit
- BWindow air conditioning unit array
- CConstant Air Volume (CAV) system
- DVariable Air Volume (VAV) system
Show answer & explanationAnswer & explanation
Correct answer: D. Variable Air Volume (VAV) system
Variable Air Volume (VAV) systems allow for precise temperature control in multiple zones by varying the airflow, which significantly enhances energy efficiency compared to constant airflow systems.
Why the other options are wrong
- A. Single-zone packaged units are not suitable for multi-zone control in a large office building.
- B. Window units are inefficient and lack the capacity and control required for a commercial multi-story building.
- C. CAV systems provide a constant airflow, making precise zone control and energy efficiency difficult.
Variable Air Volume (VAV) System
An HVAC system that varies the volume of conditioned air delivered to different zones based on their individual heating or cooling demands, optimizing energy use and providing precise temperature control.
- Energy efficient for multi-zone buildings.
- Provides individual zone temperature control.
- Reduces fan energy consumption.
Memory trick: Varying Air Volume Ventilates Vigorously for Versatile Zones.