When designing an HVAC system, two key components often come into play: Energy Recovery Ventilators (ERVs) and Air Handling Units (AHUs). Both contribute to air quality and comfort, but they serve different purposes. So, how do they compare? Let’s break it down! ?
What Is an ERV? (Energy Recovery Ventilator)
An Energy Recovery Ventilator (ERV) is designed to exchange indoor and outdoor air while recovering energy from exhaust air. It:
✔️ Transfers heat & moisture between air streams
✔️ Reduces HVAC energy consumption
✔️ Improves indoor air quality (IAQ)
✔️ Maintains humidity balance
Best for: Residential, commercial, and industrial buildings where fresh air intake is necessary without losing heating or cooling energy.
What Is an AHU? (Air Handling Unit)
An Air Handling Unit (AHU) is a central system component that conditions and circulates air throughout a building. It:
✔️ Filters, heats, cools & humidifies air
✔️ Works with chillers & boilers for temperature control
✔️ Distributes air through ductwork
✔️ Does NOT recover energy from exhaust air
Best for: Large-scale ventilation and climate control in commercial, industrial, and institutional buildings.
Key Differences: ERV vs. AHU
| Feature ? | ERV (Energy Recovery Ventilator) | AHU (Air Handling Unit) |
|---|---|---|
| Primary Function | Recovers heat & moisture while ventilating air | Conditions, filters & distributes air |
| Energy Efficiency ⚡ | ✅ Saves energy by recovering heat/cooling | ❌ Consumes more energy without recovery |
| Humidity Control ? | ✅ Helps balance indoor humidity | ✅ Can control humidity but requires humidifiers |
| Air Filtering ? | ❌ Limited filtration | ✅ Advanced filtration possible |
| Application ? | Best for fresh air ventilation in homes & buildings | Best for complete HVAC systems in large spaces |
| Works With ? | Existing HVAC systems | Chillers, boilers, and ventilation systems |
Which One Do You Need?
✔️ Choose an ERV if you want to improve air quality and save energy in a building that requires constant ventilation.
✔️ Choose an AHU if you need a full-scale air conditioning and distribution system for a large commercial or industrial space.
Pro Tip: In some cases, ERVs and AHUs can be used together to maximize energy efficiency and climate control! ?
Looking for the best ERV or AHU for your needs?
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