What is the required CFM of outdoor air for a two-car garage in a single-family dwelling unit?

The correct answer, which indicates that 200 CFM of outdoor air is required for a two-car garage in a single-family dwelling unit, is derived from ventilation guidelines set forth by relevant building codes and standards, such as those provided by the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE).

In residential settings, adequate ventilation is essential to ensure air quality and to prevent the buildup of harmful gases such as carbon monoxide from vehicles. The recommendation of 200 CFM aligns with the guidance of providing sufficient fresh air based on the size and purpose of the garage.

This specification facilitates adequate airflow, which helps stave off issues like moisture buildup and the concentration of pollutants from any equipment stored or used in the space. Ensuring the right amount of ventilation not only enhances comfort but also plays a significant role in maintaining safety standards in residential properties.