What is the maximum airflow capacity in CFM that requires make-up air for clothes dryer installations?

What is the maximum airflow capacity in CFM that requires make-up air for clothes dryer installations?

• A. 150 CFM
• B. 200 CFM
• C. 250 CFM
• D. 300 CFM

Answer: (B)

The maximum airflow capacity that requires make-up air for clothes dryer installations is indeed 200 CFM. When a clothes dryer exhausts air, it removes not only moisture but also conditioned air from the building. If the dryer is capable of exhausting a significant volume of air, specifically from 200 CFM and above, it is essential to introduce make-up air to ensure that the pressure balance in the home is maintained. This is important for several reasons: proper air balance helps prevent negative pressure that can lead to backdrafting of combustion appliances, ensures efficient drying, and maintains indoor air quality. Thus, when a dryer exceeds this airflow threshold, appropriate measures, such as installing make-up air systems, are necessary to counterbalance the air being vented outside.

The maximum airflow capacity that requires make-up air for clothes dryer installations is indeed 200 CFM. When a clothes dryer exhausts air, it removes not only moisture but also conditioned air from the building. If the dryer is capable of exhausting a significant volume of air, specifically from 200 CFM and above, it is essential to introduce make-up air to ensure that the pressure balance in the home is maintained.

This is important for several reasons: proper air balance helps prevent negative pressure that can lead to backdrafting of combustion appliances, ensures efficient drying, and maintains indoor air quality. Thus, when a dryer exceeds this airflow threshold, appropriate measures, such as installing make-up air systems, are necessary to counterbalance the air being vented outside.