Air conditioners may struggle to cool distant areas of a room due to insufficient air circulation, especially if the space is large or poorly insulated. A 2,400 BTU unit is generally adequate for smaller spaces, but air conditioning systems cannot effectively distribute cold air over long distances. Ductwork is essential for proper air distribution in larger areas. If a condensate line clogs, it's recommended to contact an HVAC professional for repairs. Using a fan can help improve airflow near insulated areas to enhance cooling efficiency.