Question: how much electricity does a 2kw oil filled heater use?
Answer: For most small- and medium-sized rooms, a 2kW device will suffice. According to the Centre for Sustainable Energy, a 2kW convector or fan heater will cost 28 pence per hour to run; a typical 1.5kW oil-filled radiator will set you back 21 pence per hour; while a 1.2kW halogen heater costs around 17 pence per hour.