How many watts does a space heater use in 2022 – BestHeaterGuide

Space heaters are essential home appliances to get the warmth inside the house. They are necessary appliances in areas where the temperature gets below zero, and there is no solution without a heating source. One of the main sources of conventional heaters is costly, and their operational cost is also very high. This is why space heaters come in. Generally, there are two types of space heaters: oil and electric heaters. Oil heaters are considered cheap, but they are not suitable for home uses for safety concerns.

On the other hand, electric heaters provide a safer approach, but they need electricity to operate. The electric heater also comes in different energy modes, and they can have multiple energy consumption depending on the settings. Most space heaters come in two to three energy modes, and by selecting these options, you can optimize your energy needs and energy consumption.

This article will understand the energy consumption of space heaters in low settings and the cost estimation.

Setting Power Consumption Of Space Heaters

Many heaters come with more than one power consumption option. Typically, indoor space heaters use 1500watt power, and other units in the market consume as low as 200 watts of energy. The standard energy settings for the space heaters are:

  • 750 watt, 1500 watt.
  • 1000 watt and 1500 watt.
  • 500 watt, 1000 watt, and 1500 watt.

There are also space heaters in the market which use up to 4000 watts, but they are considered useless in small rooms and lack portability.

How Much Energy Do Space Heaters Use In A Low Power setting?

It depends on the type of mode you selected and the minimum power consumption of the space heater. Typically speaking, most space heaters have 750 watts and 500-watt energy consumption in low settings. It is not always precisely these numbers, but you can get the accurate power consumption of your heater with the help of a multimeter. Select the multimeter to the ammeter settings and measure the current flowing into the space heater. Now, multiply it by the voltage of your area, and you would get the power consumption in watts.

Heating On Low Energy Settings

The point of the space heater is to warm the room while saving energy, but you would not want a space heater that does not produce any significant heat in energy-saving modes. To calculate how much area would be covered by space heaters in low setting mode, we have to understand the phenomenon of heating by the space heater.

Watts Requirement Of Convection Heaters

These types of space heaters work on heating the air, which would then heat the entire room. For that purpose, they are installed with ceramic or metal heating elements that provide heat to the surroundings, and then this warm air is spread into the room, sometimes with the fan. Proper insulation is required for these heaters to work effectively. If you are heating an area with a convection heater, then remember that about 10 watts of energy are required to provide supplemental heat to a unit square foot. It means at low power, setting your space heater would only effectively heat the area of just about 50 or 75 square feet.

Watts Requirement Of Infrared Heaters

Unlike convection heaters, which heat the air, infrared space heaters directly heat the objects inside the room. Whether they are chair tables or people, they are considered more energy efficient because no power is lost in the air and is not heavily affected by lack of insulation. These space heaters do not heat the atmosphere, so the calculation of 10 watts per square foot does not apply here. Instead, at 500 watts or 750 watts, they can provide supplemental heat to objects 10 feet far from the heater when nothing is blocking the path of rays.

Cost Analysis Of Heaters At Low Settings

The purpose of running the space heaters on the low setting is to save energy and the cost of the bills. You may get different accounts for power by using the same electricity. This is due to the cost of energy in states. Let’s consider a base case where you use 500-watt energy for 10 hours, 7 days a week. The energy cost in your area is $0.1 per kWh. You would consume about $0.5 per day and $15 in these conditions. If you have a different situation, you can get quick results.

Base CaseVariable Power Input (P)Number of days in the week (W)Number of hours used in the day (d)Energy Cost in the area (E) in dollars
Per Day$0.5=(P/1000)*$0.5=(W/7)*$0.5=(D/10)*$0.5=(D/0.1)*$0.5
Per Month$15=(P/1000)*$15=(W/7)*$15=(D/10)*15=(E/0.1)*$0.5

Generally, if the space heater is running for 8 hours a day at low settings, it would consume about:

  • 120 units if it uses 500 watt
  • 180 units if it uses 750 watt

How To Efficiently Use A Space Heater At Low Setting?

Selecting the low energy mode is a good approach for significance, but you can do other measures to decrease your energy bills while keeping yourself warm.

  • Know where you are going to use your space heater. Buying a large space heater for a small room is not only a waste of money, but it uses more energy and is riskier.
  • Select the infrared heater if you use it in your office cabin or another poorly insulated place.
  • Select the space heaters, which have Eco mode, which stands for economy mode. This mode will automatically shift the heater energy consumption too high if it senses too much energy drop and shifts to low energy consumption when the temperature is reached.
  • Select the space heater with numerical temperature selection mode instead of low, medium, high.
  • Properly insulate your room if you are using a convection heater.
  • Select the space heater with the timer, which automatically shuts off even if you forget.

Conclusion

Space heaters are an economical solution to winter chills, and you can use them in a wide range of environments due to their portability and easy installation. Running the space heater on a low setting can cut the billing cost in half if you use them properly. But using the space heaters in low settings can reduce the heat generation, which may not be enough to keep you warm. You can also overcome this problem by following the steps mentioned above.

Frequently Asked Questions

What Is Supplemental heat?

Supplemental heat is a term used to describe the temperature increase in only the areas where the need for more heat is felt. In general terms, it is the technique to increase the temperature of the room or place you are in and not the entire home.

How Much Is Energy Required To Heat A Medium-Sized Room?

If you consider the thumb rule, a medium-sized room is about 200 square feet in size, so it would need a 2000 watt energy convection heater to increase the temperature effectively up to 10oF. Still, infrared heaters can save your hearing and precisely heat your bed or directly you. Typically the infrared heaters are considered to be 30% more energy efficient.


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Emma Johnson
By Emma Johnson

Hi, This is Emma. Author at “BestHeaterGuide.com”. I am a graduate of Mechanical Engineering. Currently researching on heating technology. However, I have learned many home heating techniques and still learning home heating technology. And I love to share my research and reviews.

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