How much does a heater cost in electricity?
, 7 min reading time
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A heater is a convenient device for warming a room or patio, but many people wonder what it costs to run. The answer depends on several factors: the type of heater, the wattage, the size of the space, and current energy prices. Whether you use an electric heater indoors or are considering a patio heater for outside — understanding power consumption helps you make an informed choice. In this article, we calculate the costs of a heater step by step and share practical tips for saving energy.
What is a heater and how does it work?
A heater is a device that generates heat in a room or outdoor space. It can run on gas or electricity, and its output is measured in watts (W) — this determines how much heat the device can produce. Several types are available, including convection heaters, radiant heaters, and fan heaters, each with their own advantages and disadvantages depending on the application.
Convection heaters warm the air in a room, which then circulates. Radiant heaters — such as many patio heaters — warm objects and people directly, without first heating the surrounding air. This makes them particularly suitable for outdoor use, where wind loss significantly reduces the efficiency of convection heating. Fan heaters combine both methods by actively blowing warm air through the space.
Power consumption of a heater
The power consumption of an electric heater depends primarily on the wattage and duration of use. The higher the wattage, the more electricity the device consumes per hour.
Average consumption per hour
A heater with an output of 1000 watts consumes approximately 1 kWh per hour. A 2000-watt heater consumes around 2 kWh per hour. Most patio heaters have an output between 1500 and 2500 watts, depending on the type and the area to be heated.
How wattage affects consumption
The wattage of a heater has a direct impact on both its heating capacity and its power consumption. Too high a wattage leads to unnecessary energy use, while too low a wattage fails to provide sufficient heat for the space. When purchasing a patio heater, it is therefore advisable to match the wattage to the size of the patio or space you wish to heat.
Duration of use also plays a major role. The longer the heater is on, the higher the total consumption. It is advisable to use the heater only when needed and to switch it off as soon as the heat is no longer required.
What does a heater cost per hour, day, and year?
At an average energy rate, an electric heater consumes between 1 and 3 kWh per hour, depending on the wattage. With an average use of 3 hours per day, annual costs can quickly add up to around €100, depending on the current energy rate and frequency of use. For a patio heater that is used more often and for longer periods — for example, throughout an entire patio season — costs can be considerably higher.
The exact amount naturally depends on your personal energy contract and the current price per kWh. By multiplying your heater's wattage by the number of hours of use and your energy rate, you can make an accurate estimate yourself.
Tips for reducing electricity costs
- Choose an energy-efficient heater: Models with a thermostat regulate the temperature automatically and prevent unnecessary power consumption.
- Use a timer: Only switch the heater on when you actually need it.
- Insulate the space: A well-insulated room or covered patio retains heat for longer, so the heater doesn't have to work as hard.
- Choose the right wattage: A heater that is well matched to the surface area consumes more efficiently than a model that is too powerful or too weak.
- Combine with radiant heat: For outdoor use, radiant heaters are often more efficient than convection models, as they are less affected by wind loss.
Frequently asked questions
How much does a patio heater cost to run per hour?
An average patio heater with 2000 watts consumes approximately 2 kWh per hour. Depending on the current energy rate, this typically amounts to a few cents per hour. The exact amount depends on your energy contract.
Which type of heater is the most energy-efficient?
Radiant heaters are generally more energy-efficient for outdoor use, as they warm objects and people directly rather than the surrounding air. For indoor use, models with a thermostat are more efficient, as they automatically adjust consumption to the desired temperature.
Is electric heating more expensive than gas?
In general, electricity is more expensive per unit of energy than gas, which means electric heaters typically incur higher direct running costs. However, the actual costs depend heavily on current energy prices and the specific wattage of the device.
How do I calculate the power consumption of my heater?
Multiply the heater's output in kilowatts (kW) by the number of hours of use to calculate the consumption in kWh. Then multiply this by your energy rate per kWh to determine the costs.
How many watts does a patio heater need for an average patio?
For an average patio of approximately 9 to 12 m², a patio heater with an output between 1500 and 2000 watts is generally sufficient. For larger or fully open patios, a higher wattage — or multiple heaters — may be required to provide adequate warmth.
Why Doika?
At Doika, we understand that the right patio heater is just as much about efficiency as it is about comfort. Our range is carefully curated for output, energy efficiency, and quality — not volume. We deliver with short, reliable delivery times and a clear warranty policy. Have questions about wattage, placement, or consumption? Our team is here to help. Returns are simple and transparent.
Conclusion
The power consumption of a heater depends on the wattage, duration of use, and your energy rate. On average, a heater consumes between 1 and 3 kWh per hour, which can add up to significant costs over the course of a year. By choosing an energy-efficient model with a thermostat and being mindful of how long you use it, you can keep costs under control. Browse the range of patio heaters at Doika and find the heater that suits your needs.
Frequently Asked Questions
How much does a patio heater cost per hour?
An average 2000-watt patio heater uses about 2 kWh per hour. Depending on the current energy rate, this usually amounts to a few tens of cents per hour. The exact cost depends on your energy contract.
Which type of heater is the most energy-efficient?
Radiant heaters are generally more energy-efficient for outdoor use because they heat objects and people directly instead of the surrounding air. For indoor use, models with a thermostat are more efficient because they automatically adjust energy use to the desired temperature.
Is electric heating more expensive than gas?
In general, electricity is more expensive per unit of energy than gas, so electric heaters usually come with higher direct electricity costs. However, the actual costs depend heavily on current energy prices and the specific power output of the device.
How do I calculate the electricity consumption of my heater?
Multiply the heater’s power in kilowatts (kW) by the number of hours used to calculate consumption in kWh. Then multiply this by your energy rate per kWh to determine the cost.
How many watts does a patio heater need for an average terrace?
For an average terrace of around 9 to 12 m², a patio heater with a power output between 1500 and 2000 watts is usually sufficient. For larger or fully open terraces, higher output or multiple heaters may be needed for enough warmth.
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