When selecting a room heater for winter, prioritize safety, energy efficiency, and suitability for room size over just price. Budgeting between Rs. 1500 and Rs. 4,000 typically ensures essential safety features like thermal cut-off, preventing overheating. Match heater wattage to room size; a 750W heater suffices for 100 sq ft, while 1500W is better for 170 sq ft. Common types include halogen, fan, and oil-filled heaters, each suited for different needs and room dimensions.