How do energy recovery ventilators (ERVs) improve energy efficiency?

How do energy recovery ventilators (ERVs) improve energy efficiency?

• A. By filtering outdoor air before entry
• B. By recovering energy while exchanging air
• C. By minimizing indoor temperature fluctuations
• D. By increasing the airflow rate

Answer: (B)

Energy recovery ventilators (ERVs) enhance energy efficiency primarily by recovering energy during the air exchange process. ERVs operate by transferring the heat and moisture between incoming outdoor air and the outgoing indoor air. This means that when fresh air is drawn into a building, it is conditioned to be closer in temperature and humidity to the indoor air, reducing the workload on heating or cooling systems. As a result, less energy is required to bring the incoming air to a comfortable indoor environment, leading to improved overall energy efficiency. This method of energy recovery not only helps in maintaining indoor air quality through proper ventilation but also significantly lowers energy costs associated with heating or cooling the air.

Energy recovery ventilators (ERVs) enhance energy efficiency primarily by recovering energy during the air exchange process. ERVs operate by transferring the heat and moisture between incoming outdoor air and the outgoing indoor air. This means that when fresh air is drawn into a building, it is conditioned to be closer in temperature and humidity to the indoor air, reducing the workload on heating or cooling systems. As a result, less energy is required to bring the incoming air to a comfortable indoor environment, leading to improved overall energy efficiency.

This method of energy recovery not only helps in maintaining indoor air quality through proper ventilation but also significantly lowers energy costs associated with heating or cooling the air.