Question: are small space heaters expensive to run?
Answer: This means for each hour the space heater is running it consumes 1.5 kWh of electricity, which costs about 16 cents. ... But running that heater nonstop is a surefire way to increase your electric bill. If you ran one 1,500 watt space heater for 24-hours a day for a single month it would cost about $118.