What is one major environmental benefit of using a makeup air unit?

Using a makeup air unit has a significant environmental benefit by reducing the carbon footprint of HVAC systems. These units bring in fresh outdoor air to replace the air that is exhausted from the building, ensuring that there is a continuous, balanced supply of fresh air without causing pressure imbalances. This process allows HVAC systems to operate more efficiently, as they do not have to work as hard to condition the air. When HVAC systems function efficiently, they typically use less energy, which in turn means lower greenhouse gas emissions and reduced reliance on fossil fuels. This efficiency can decrease the overall carbon footprint associated with heating, cooling, and ventilating the building.

The other options do not contribute to the environmental benefits linked to makeup air units. For instance, increasing the use of plastic materials contradicts sustainability goals, enhancing aesthetic appeal does not necessarily correlate with environmental advantages, and minimizing noise primarily addresses comfort rather than ecological impact.