Southern winters are damp and cold, so there are various heating options for homes, catering to different budgets. For extreme cost-effectiveness, a combination of an electric mattress and a small electric heater can be used, costing only a few hundred yuan in electricity per winter, suitable for users with limited budgets. A high-performance option that balances comfort and cost is air conditioning as the primary source, oil-filled radiators/electric heating films for bedrooms, and electric blankets as a backup. For a three-bedroom apartment of 80-120 square meters, the quarterly electricity cost is approximately 1200-3200 yuan. If you are renovating a new home and want a complete solution from the start, an air source heat pump combined with underfloor heating or radiators is the ideal choice. The operating cost is only about half that of a gas boiler, with a quarterly heating cost of approximately 1500-2500 yuan for 100 square meters, potentially recouping the initial installation cost in the long run. While gas boilers offer comfort, gas costs are high, and electric underfloor heating is expensive to operate and inconvenient to maintain; therefore, large-scale use is generally not recommended. Regardless of the option chosen, improving the house's insulation should be the first priority-such as installing double-glazed windows, adding weatherstripping to doors and windows, and using thicker curtains. Otherwise, heat loss will significantly increase energy consumption and costs. It is recommended to consult a local HVAC company before making a decision to obtain solutions and quotes tailored to your specific apartment type.