Heat loss refers to the transfer of thermal energy from a warmer object or space to a cooler one. This process occurs through various mechanisms, including conduction, convection, and radiation. For example, when a house is heated, warmth can escape through walls, windows, and roofs, leading to increased energy consumption for heating. To minimize heat loss, proper insulation is essential. Materials like fiberglass or foam can be used in walls and attics to reduce the amount of heat that escapes. Additionally, sealing gaps around doors and windows can help maintain indoor temperatures, making spaces more energy-efficient and comfortable.