The ideal direction for a living room window in the United States is typically either the north or south. This recommendation is based on maximizing natural light and minimizing heat gain during different seasons. Northern exposure is often preferred due to its consistent, diffused light throughout the day, which reduces glare and shadows. According to the U.S. Department of Energy, southern-facing windows can provide up to 30% more heat gain in the winter, but they also lead to higher cooling costs in the summer. Northern windows, on the other hand, provide a more balanced light exposure year-round, reducing the need for artificial lighting and air conditioning. Additionally, the American Architectural Manufacturers Association (AAMA) suggests that windows facing the north are more energy-efficient as they help maintain a stable indoor temperature.