Homes today are sealed more tightly than they used to be. That’s good for keeping heat inside during winter and saving energy, but it also means fresh air has a harder time getting in. Without some form of ventilation, indoor air can become stale. Odors linger longer, moisture builds up, and indoor pollutants from cooking, cleaning supplies, and daily living accumulate over time.
A ventilation system solves this by exchanging indoor and outdoor air while recovering the heat you’ve already paid for. The two most common options are ERVs and HRVs. In northern climates like Michigan, HRVs tend to be the better fit because they focus on heat transfer rather than moisture transfer. They bring in fresh outdoor air and expel stale indoor air while using a heat exchanger to keep the temperature stable. This helps maintain comfortable humidity in winter without adding extra moisture to the home.
ERVs, which transfer both heat and some moisture, are often used in southern climates where the goal is to reduce incoming humidity. In Michigan, however, outdoor air is already dry for much of the year, so capturing heat is typically the priority. That said, certain homes with specific indoor humidity challenges might still benefit from an ERV. The choice depends on the home’s unique environment rather than a one-size-fits-all rule.
The real value of either system is improved air quality. Constant ventilation reduces the buildup of indoor pollutants, removes cooking smells more effectively, and helps regulate moisture. Many homeowners who install an HRV notice that their home feels fresher throughout the day, especially during the winter when windows stay closed. As people become more aware of indoor air quality and its effect on health, balanced ventilation is becoming a key part of creating a more comfortable living space.
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