How do HRVs and ERVs provide ventilation?

Heat Recovery Ventilators (HRVs) and Energy Recovery Ventilators (ERVs) provide ventilation by continuously exchanging stale indoor air for fresh outdoor air while recovering energy from the air they exhaust. They can operate in various modes, either continuously or intermittently, depending on the specific needs of the building and the occupants' preferences. This flexibility allows for optimal indoor air quality without compromising energy efficiency.

When set to operate continuously, HRVs and ERVs maintain a steady flow of fresh air, promoting consistent ventilation. Alternatively, when operating intermittently, they can be programmed or activated as needed, such as during peak occupancy times or in response to specific air quality issues. This versatility is particularly beneficial in meeting varying ventilation demands while ensuring a balanced energy use.

Manual operation by occupants is not required for these systems to function effectively; they are designed to automate the ventilation process, ensuring that the indoor environment remains comfortable and healthy. They also do not rely solely on exhaust fans, as their primary purpose involves balanced air exchange, which includes both the supply of fresh air and the exhaust of stale air. Their design allows for optimal performance in any season, not just during heating or cooling periods, making them suitable for year-round use.