ERV (Energy Recovery Ventilator)
An ERV (Energy Recovery Ventilator) is a device used in modern energy-efficient buildings to exchange indoor and outdoor air while saving energy. Think of it like a smart ventilation system that keeps the building fresh while reducing heating and cooling costs. When old air goes out, the ERV captures its temperature and moisture, using them to pre-treat incoming fresh air. This is important in green building because it helps buildings use less energy while maintaining good air quality. Similar systems include HRV (Heat Recovery Ventilator), but ERVs are special because they can also transfer moisture, not just heat.
Examples in Resumes
Designed and specified ERV systems for LEED-certified office buildings
Managed installation of Energy Recovery Ventilator units across multiple floor levels
Reduced building energy costs by 30% through ERV implementation
Coordinated maintenance schedules for building ERV and Energy Recovery Ventilator systems
Typical job title: "HVAC Engineers"
Also try searching for:
Where to Find HVAC Engineers
Professional Organizations
Online Communities
Example Interview Questions
Senior Level Questions
Q: How would you approach designing an ERV system for a large commercial building?
Expected Answer: Should discuss evaluating building size, climate, occupancy, considering cost-benefit analysis, energy savings calculations, and coordination with other building systems. Should mention importance of meeting building codes and ASHRAE standards.
Q: What factors do you consider when sizing an ERV system?
Expected Answer: Should mention building occupancy, local climate conditions, indoor air quality requirements, energy efficiency goals, and budget constraints. Should also discuss integration with existing HVAC systems.
Mid Level Questions
Q: Can you explain the difference between an ERV and HRV?
Expected Answer: Should explain that ERVs transfer both heat and moisture while HRVs only transfer heat. Should discuss when each system is more appropriate based on climate and building type.
Q: How do you maintain an ERV system?
Expected Answer: Should discuss regular filter changes, cleaning of heat exchange core, checking condensate drains, fan maintenance, and importance of scheduled inspections.
Junior Level Questions
Q: What are the basic components of an ERV system?
Expected Answer: Should identify main parts: heat exchange core, fans, filters, controls, and ductwork. Should understand basic function of each component.
Q: What are the main benefits of using an ERV?
Expected Answer: Should mention energy savings, improved indoor air quality, humidity control, and reduced HVAC equipment size. Should understand basic energy recovery concept.
Experience Level Indicators
Junior (0-2 years)
- Basic understanding of HVAC systems
- Reading mechanical drawings
- Knowledge of building codes
- Basic ERV maintenance procedures
Mid (2-5 years)
- ERV system design
- Energy calculations
- Project coordination
- Troubleshooting installation issues
Senior (5+ years)
- Complex system design
- Energy modeling
- Project management
- Team leadership
Red Flags to Watch For
- No knowledge of basic HVAC principles
- Unfamiliarity with building codes and standards
- Lack of experience with energy calculations
- No understanding of indoor air quality requirements
Related Terms
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