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Energy Efficiency of Heat Recovery Ventilator
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- HRVs can be an energy-efficient way to provide necessary ventilation and air exchange in homes and buildings.
- The heat recovery core transfers thermal energy between air streams, retaining indoor conditioned air heat.
- This pre-heating of incoming air in winter reduces the boiler energy needed to reheat air to room temperature.
- Similarly, the HRV reduces air conditioning load in summer by pre-cooling warmer incoming air.
- Well-designed units can recover 60-80% of heating or cooling energy that would be lost through ventilation.
- HRVs run continuously, but variable speed motors and controls minimize electrical consumption.
- Newer HRV models also have very efficient ECM (electronically commutated) motors.
- When properly installed and controlled, HRVs can significantly increase the overall energy efficiency of a building relative to ventilation requirements. Regular maintenance is important.
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