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What does a Heat Recovery Ventilator Do?
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- A heat recovery ventilator (HRV) complements your existing furnace or home heating system, increasing efficiency and helping your HVAC system reduce your energy bills. It works independently of your furnace and recycles the heat inside your home.
- An HRV is a mechanical ventilation device that exchanges air between the interior and exterior of a building.
- On heating boiler systems, the HRV provides controlled, balanced ventilation that replenishes indoor air.
- Inside the HRV are chambers that allow fresh incoming air and stale indoor exhaust air to pass next to each other without mixing.
- The fresh and exhaust airflows transfer heat and moisture between each other across heat exchanger membranes.
- In winter, the warmer indoor air preheats the cold incoming outdoor air without loss of interior heat.
- In summer, the cool incoming air helps reduce the temperature of the warm indoor air being exhausted.
- HRVs use two ducted air streams and fans to manage the balanced airflows.
- The airflows are filtered to clean incoming and exhaust air.
- Ventilation rates are adjusted via motorized dampers that modulate the air volume moved.
- HRVs connected to boilers provide fresh, tempered make-up air for proper burner combustion and indoor air quality.
- The HRV is a key component enabling boilers to provide both space heating and ventilation efficiently. Units should be maintained and filters changed regularly.
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