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Heat Recovery Ventilation (HRV) - How It Works

Gul Bahar Shah
  Heat Recovery Ventilation (HRV) - How It Works A Heat Recovery Ventilator (HRV) is a mechanical ventilation system that recovers heat from exhaust air and transfers it to incoming fresh air without mixing the two air streams. ✦ Main Components 1. Supply Fan - Draws fresh air from outside. 2. Exhaust Fan - Removes stale indoor air. 3. Heat Exchanger Core (Aluminum / Polymer) - Transfers heat between air streams. 4. Air Filters - Remove dust and contaminants. 5. Condensate Drain - Removes moisture formed during heat exchange. 6. Dampers - Control airflow direction and volume. ✦ Working Principle 1. Fresh outdoor air enters the HRV through the intake duct. 2. Stale indoor air is simultaneously extracted from the building. 3. Both air streams pass through a heat exchanger core. 4. Heat transfers from the warmer air to the cooler air without mixing the air streams. 5. The system pre-heats or pre-cools the fresh air before it enters the room. ✦ Key Benefits ✓ Improves indoor air qualit...
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Heat Recovery Ventilation (HRV) - How It Works

Gul Bahar Shah

 Heat Recovery Ventilation (HRV) - How It Works

A Heat Recovery Ventilator (HRV) is a mechanical ventilation system that recovers heat from exhaust air and transfers it to incoming fresh air without mixing the two air streams.
✦ Main Components
1. Supply Fan - Draws fresh air from outside.
2. Exhaust Fan - Removes stale indoor air.
3. Heat Exchanger Core (Aluminum / Polymer) - Transfers heat between air streams.
4. Air Filters - Remove dust and contaminants.
5. Condensate Drain - Removes moisture formed during heat exchange.
6. Dampers - Control airflow direction and volume.
✦ Working Principle
1. Fresh outdoor air enters the HRV through the intake duct.
2. Stale indoor air is simultaneously extracted from the building.
3. Both air streams pass through a heat exchanger core.
4. Heat transfers from the warmer air to the cooler air without mixing the air streams.
5. The system pre-heats or pre-cools the fresh air before it enters the room.
✦ Key Benefits
✓ Improves indoor air quality (IAQ)
✓ Reduces HVAC energy consumption by 20–40%
✓ Maintains balanced ventilation
✓ Removes moisture, odors, and pollutants
✓ Supports green building and energy efficiency standards
✦ Where HRV Systems Are Used
• Residential buildings
• Hospitals
• Commercial buildings
• Data centers
• Laboratories
• Energy-efficient buildings

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