What type of ventilation system introduces fresh air into a home?

The Heat Recovery Ventilator (HRV) and Energy Recovery Ventilator (ERV) systems are specifically designed to introduce fresh air into a home while optimizing energy efficiency. These systems work by drawing in outdoor air, conditioning it, and then distributing it throughout the living spaces. They often do this while expelling stale indoor air, ensuring that the air quality inside the home is improved without significant energy loss.

Both HRVs and ERVs also have the added benefit of recovering heat or energy from the outgoing air, which helps in maintaining the indoor temperature effectively. This makes them an ideal choice for homes that require controlled fresh air intake, especially in tightly sealed buildings where natural air exchange might be insufficient.

In contrast, other options, like exhaust fan systems and attic ventilators, do not consistently bring in fresh air; rather, they primarily focus on expelling air from the home. Natural ventilation through windows relies on outdoor conditions, and while it can provide fresh air, it does not offer the controlled and energy-efficient advantages that HRVs and ERVs provide.