Really, it all depends what kind of heater you're looking for and more importantly how you use it. It's also important to note that, if used for over long periods of time, electric room heaters can be expensive to run (as electric is more expensive than gas).
On average, space heaters use 1,500 watts of electricity.
Using a space heater 8 hours per day will use about 84 kilowatt-hours of electricity per week. It costs an average of $51.65 to run a space heater for a month and $258.26 to run for a year.
Savings using a space heater for 8 hours per day
Those with electric heat save less -- about $72 respectively -- and folks with natural gas, which is currently cheap, would pay about $36 more than if they ran a space heater.
One advantage of space heaters is their lower upfront cost compared to central heaters. However, it's essential to consider the energy consumption and operating costs over time. Space heaters tend to be less energy-efficient and may consume more electricity or fuel to generate heat.
The cheapest way to heat your house with electricity is to use a heat pump. Instead of using the energy to create heat (through resistive heating), you use the energy to move heat from a colder area to a warmer area. The most efficient heat pump is a water source heat pump.
Generally speaking, Halogen heaters are one of the most inexpensive types of electric heater. They average around 1200W in terms of power output and because they provide instant-heat at close quarters, you shouldn't need to leave them on for long periods of time.
Example (you can use an electric heater running cost calculator below for different wattages/kWh prices): If we assume the price of electricity is $0.1319 per kWh, a 1,500-watt electric space heater will cost; $0.20 to run per hour. $4.80 to run per 24 hours (day). $11.20 to run per week (8h/day).
Electric heaters are 100% efficient at point of use as they convert every watt of electricity taken from the wall into usable heat, meaning there's zero waste. In this sense, all electric heaters do in fact have the same efficiency.
Using a space heater can be a good way to boost the temperature in a small, drafty room—and it could be less expensive than cranking up your central heating system. But a space heater is economical only if you use it judiciously.
Electric heaters may be essential if you live in one of the four million or so households in the UK that don't use mains gas heating and are a good solution if you're just looking to heat one room, or only need to heat in short, sharp bursts. Your heater's power will be measured in kilowatts (kW).
Electric heaters of any type are unsafe to leave running overnight because they carry a significant amount of risk. If a space heater falls over or becomes too hot from running for too long of a period of time, that can lead to a fast-moving fire that occurs while you are asleep and cannot act fast enough.
Reverse cycle split system air conditioners (A.K.A heat pumps) – the most energy efficient electric heater. 5 and 6 star reverse cycle units can be even cheaper to run than gas heaters, producing just one-fifth of the greenhouse gas emissions that a standard electric heater creates.
At Night: If you choose to use your space heater overnight, it's best to limit its operation to 4 to 6 hours on a lower setting.
They can also be more efficient when you will be using a room for a short period because they save energy by directly heating the occupant of the room and the occupant's immediate surroundings rather than the whole room. Safety is a top consideration when using small space heaters.
In other words, a 1,500-watt heater will be great for a 250-square-foot room with central heat. If that same room had no other source of heat, you'd need a 2,000-watt heater.
If you use a space heater in your home, please be aware that using a space heater can cause a significant increase in your monthly bill. A 1,000-watt space heater operating 12 hours a day will add about $40 to your monthly bill. If the cost does not deter you, remember how important it is to use space heaters safely.
Oil-filled heaters can be very energy efficient, especially for long-term use. Once the oil is heated, these heaters can continue to provide warmth even after being turned off, using less electricity overall.
The cost to run a 1,500-watt space heater depends on how much your energy company charges you for electricity. However, in the United States, the average household pays somewhere around $0.20 per hour to run their electric space heater.
Halogen heaters are among the most cost-effective electric heater options, with a typical power output of 1200W. Their immediate warmth in close proximity saves energy by not needing to be left running for long stretches of time.
It might be cheaper to heat one room with an electric heater. But it depends on the size of the room and how long you need to heat it for. Although gas costs about four times less than electricity per kWh, it will usually be heating more than one room through the central heating system.
1,500 watts (space heater rating) x 6 (average daily hours) = 9,000 watts or 9 kilowatts of electricity daily. 9 kilowatts x 9 cents per kilowatt = 81 cents per day. On a monthly basis, the cost of running a typical household space heater six hours per day is, therefore, $24.30.
To save money, aim to have your temperature set around 68-72 degrees Fahrenheit when you're at home and awake. This is a comfortable temperature for most with the help of a light sweater. Overnight and when you're out, around 64 degrees Fahrenheit will keep your home at a good temperature.
Open your curtains during the day - the sun still provides warmth even in the winter months. Make sure you close them as soon as the sun sets to keep the warm air in. Investing in thicker curtains, or thermal curtain liners, will help keep the cold air out and prevent heat loss.
In the winter, set your thermostat to 68 degrees or the lowest comfortable temperature. In warmer months, set it to 78 degrees or higher. It's a no-cost option to reduce energy expenses. At night or when you're going to be away from home for an extended period, adjust the thermostat a few more degrees.