Demand Control Ventilation
Demand Control Ventilation (DCV) is a smart building system that automatically adjusts the amount of fresh air coming into a building based on how many people are inside. Think of it like a smart thermostat, but for fresh air instead of temperature. It helps buildings save energy by not over-ventilating when fewer people are present. This approach is becoming increasingly popular in modern green buildings because it reduces energy costs while maintaining good air quality. You might also hear it called "occupancy-based ventilation" or "CO2-based ventilation control."
Examples in Resumes
Implemented Demand Control Ventilation systems resulting in 30% energy savings across office buildings
Managed retrofit projects incorporating DCV technology in commercial spaces
Designed Demand-Control Ventilation solutions for LEED-certified buildings
Typical job title: "HVAC Controls Engineers"
Also try searching for:
Where to Find HVAC Controls Engineers
Professional Organizations
Online Communities
Job Boards
Example Interview Questions
Senior Level Questions
Q: How would you approach implementing a DCV system in an existing building?
Expected Answer: A senior candidate should discuss conducting building assessments, evaluating existing systems, calculating potential energy savings, and creating an implementation plan that minimizes disruption to occupants.
Q: What factors would you consider when designing a DCV system for a new construction project?
Expected Answer: Look for answers about building occupancy patterns, space types, local building codes, integration with other building systems, and energy efficiency goals.
Mid Level Questions
Q: How do you ensure a DCV system is working efficiently?
Expected Answer: Should discuss monitoring CO2 levels, checking sensor calibration, reviewing energy consumption data, and ensuring proper air distribution throughout the building.
Q: What are common problems with DCV systems and how would you troubleshoot them?
Expected Answer: Should mention sensor issues, control system programming, maintenance requirements, and basic troubleshooting steps.
Junior Level Questions
Q: What is the basic principle behind Demand Control Ventilation?
Expected Answer: Should explain how the system adjusts ventilation based on occupancy levels, usually through CO2 monitoring, to save energy while maintaining good air quality.
Q: What are the main components of a DCV system?
Expected Answer: Should identify basic components like CO2 sensors, controllers, dampers, and how they work together in a simple system.
Experience Level Indicators
Junior (0-2 years)
- Basic understanding of HVAC systems
- Reading building control diagrams
- Knowledge of ventilation standards
- Basic computer skills for control systems
Mid (2-5 years)
- System programming and configuration
- Energy calculations and analysis
- Troubleshooting and maintenance
- Building code compliance
Senior (5+ years)
- System design and specification
- Project management
- Energy optimization strategies
- Team leadership and client consultation
Red Flags to Watch For
- No knowledge of basic HVAC principles
- Unfamiliarity with building codes and ventilation standards
- Lack of experience with building control systems
- No understanding of energy efficiency concepts
Related Terms
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