How does exhaust whole-house ventilation operate?

Exhaust whole-house ventilation systems focus on removing stale indoor air, thereby creating a negative pressure within the home that allows fresh outdoor air to enter through existing leaks and openings. This method is effective for improving indoor air quality because it ensures that pollutants, moisture, and other contaminants are expelled from the living space. As stale air is expelled, fresh air enters the building to replace it, thus maintaining ventilation without relying on mechanical air intakes.

This system contrasts with other options, which suggest varying methods of air exchange and management. For instance, some options describe systems that introduce fresh air directly while pushing out stale air or focus on balancing pressure, which can lead to inefficient ventilation if not done correctly. The exhaust approach is particularly valuable in climates or situations where managing indoor air quality is crucial.