Inefficient central HVAC systems with single thermostats cause energy waste, discomfort, and waste money. These systems, which are common in most homes, fail to accommodate variable room temperatures, resulting in discomfort and wasted energy. With 113 million North American residences equipped with HVAC equipment and 565 million rooms experiencing temperature discrepancies, the problem remains. Most thermostats only measure temperature in one location, ignoring the needs of other spaces. As a result, homes spend half of their $2000 yearly energy budget—$1000—on heating and cooling systems alone. This reliance on inefficient HVAC systems wastes money while also contributing to environmental damage. It’s time to prioritize energy economy, thermal comfort, and sustainability.