During which season do HRVs and ERVs primarily focus on heat recovery?

Study for the NHIE Insulation and Ventilation Exam. Review content with flashcards and multiple-choice questions, each offering hints and explanations. Ensure you are prepared for the test!

Heat Recovery Ventilators (HRVs) and Energy Recovery Ventilators (ERVs) are particularly effective in winter because they help manage the significant temperature differences between the cold outside air and the warm indoor environment. During this season, HRVs and ERVs reclaim heat from the exhaust air that would otherwise be lost when fresh outdoor air is drawn inside for ventilation.

When the outdoor air is very cold, these systems transfer the heat energy from the outgoing air to the incoming air, thereby preheating it before it enters the living space. This process significantly improves energy efficiency, reducing heating demands on HVAC systems.

In contrast, while HRVs and ERVs can operate in other seasons, their primary function of heat recovery is most critical in winter when heating is needed the most. In spring, summer, and fall, while these systems can still operate efficiently, the emphasis is typically on ventilation and humidity control rather than maximizing heat recovery.

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