What occurs if the CFM in a duct system is too low?

When the cubic feet per minute (CFM) in a duct system is too low, it results in decreased air quality. Insufficient airflow leads to a stagnation of air within the space, causing particulate matter, dust, and other contaminants to remain in the environment longer than they should. This buildup can negatively affect indoor air quality, leading to potential health issues for occupants due to the concentration of allergens and pollutants.

In addition, low airflow may cause stratification of temperatures within the space, where some areas become too hot or too cold, further exacerbating poor air quality due to ineffective ventilation. Proper CFM levels are crucial for ensuring that air is adequately circulated and filtered, which directly impacts the comfort and health of the indoor environment.