Tonha Portable Heater FanFor small spaces like a bedroom, you can pick a radiant, fan, or oil filled column heater. But the specific type of heater to buy will depend on your needs. If you prefer quick heating, then fan and oil filled types will fit your criteria. Oil filled heaters though are behind fans in terms of response time. A fan heater is simply better in giving fast, uniform heat. Features: This miniature wall heater is simply perfect for winter and cold conditions.