Many homeowners in the United States experience cold indoor temperatures during winter, often due to unnoticed air leaks rather than heating system failures. According to the U.S. Department of Energy, air infiltration is a leading cause of heat loss, allowing cold air to enter and warm air to escape through cracks around doors, windows, and ceilings. A study by Ohio State University indicates that excessive air leakage can create cold spots, increase heating bills, and lead to dampness, which may foster mold growth. Common areas for drafts include gaps near windows and doors, cracks at the foundation, and loose outlets. Fortunately, many air leaks can be sealed using DIY techniques such as caulking and weather stripping, which require minimal materials and time. For larger gaps, foam sealants can provide a more effective solution. Sealing air leaks not only lowers energy bills but also enhances indoor air quality by reducing pollutants and humidity. While many repairs can be done independently, homeowners may benefit from professional energy audits to identify hidden gaps. Addressing these small issues can significantly improve home comfort and reduce heating costs.