What is the minimum distance required between external in and out vents for HRV systems?

The minimum distance required between external intake and exhaust vents for Heat Recovery Ventilation (HRV) systems is 6 feet. This distance is essential to ensure that the intake air does not pick up any contaminants or negative influences from the exhaust air being expelled from the system. By maintaining this separation, the HRV system can more effectively manage indoor air quality, allowing for the circulation of fresh air without the risk of reintroducing stale or polluted air into the living space.

Proper vent placement also helps in preventing cross-contamination and supports the efficient functioning of the system. If the vents are too close, issues such as odor migration and thermal crossover can arise, which can undermine the efficacy of the HRV system and potentially affect occupant health and comfort. Thus, adhering to the 6-foot minimum ensures both optimal performance and compliance with best practices in HVAC system installation.