Heating buildings involves using various systems to maintain a comfortable indoor temperature during cold weather. Common methods include furnaces, boilers, and heat pumps, which generate warmth and distribute it throughout the space. These systems can run on different energy sources, such as natural gas, electricity, or oil. Insulation plays a crucial role in heating efficiency by reducing heat loss through walls, roofs, and windows. Properly insulated buildings require less energy to maintain warmth, leading to lower utility bills and a smaller environmental impact. Regular maintenance of heating systems ensures they operate effectively and safely.