 # How Many Amps Does a Space Heater Use?

Are you wondering how many amps a space heater uses? The number can vary depending on the size and type of heater, but knowing the exact draw of power is important for ensuring your home’s electrical system can handle the added demand.

## Quick Summary A space heater typically uses 2 to 15 amps, depending on the size, wattage, voltage, and other factors. Most small to medium-sized space heaters use 5 to 10 amps, while larger models can draw up to 15 amps of current. Aside from wattage, the size and insulation of a room also affects the wattage a space heater can use. A larger, less insulated room requires a more powerful space heater to heat it effectively.

To find out exactly how many amps of current your particular space heater uses, look at the rating plate on the back or bottom of the heater. This plate will give you the wattage needed for your heater as well as its current draw in amps. Knowing the exact number of amps of your heater allows you to determine if your electrical system can handle the load.

## What Is the Amps Usage of a Space Heater?

Space heaters are a great way to heat a room or small area. They provide quick heating up of a designated space, with the tradeoff being a higher electricity usage than some other heating systems.

### How Many Amps Does a Space Heater Use?

The amount of amps a space heater uses depends on the wattage of the heater. Generally, the higher the wattage the more amps the heater will require. For example, a 1500-watt heater will require 12.5 amps, while one with 2000 watts requires 16.7 amps. It’s important to check the product label or manual as some space heaters have different specific amp requirements.

To get a rough estimate of how many amps your space heater needs, you can use the following calculation:

• Multiply the wattage of the heater by the number of volts available.
• Divide the resulting value by 1000. You’ll get a number expressed in kW.
• Divide the kW value by the number of volts available. The result will represent the amps required for the space heater.

### Is My Circuit Breaker Capable Of Handling The Amps Usage Of My Space Heater?

It’s important to check the number of amps that your space heater needs and make sure it won’t exceed the capacity of your circuit breaker. If you’re unsure of the capacity of your breaker, check your circuit breaker panel or contact an electrician for assistance.

Space heaters can be a great addition for heating up a small area; with proper care and maintenance they can help keep a space comfortable and safe. Knowing the exact amps usage of a space heater is essential to determine if your circuit breaker can handle the additional load.

## Personal Experience As an expert in the heating and cooling industry, I have experience determining the amperage needed by a space heater. Generally speaking, space heaters require an amperage rating of 15-20 amps, depending on the size and power of the device. To better understand how many amps a space heater uses, it is important to first understand what an amp is. Essentially, one amp is equal to the amount of power it takes to power ten 100-watt light bulbs. That being said, the amperage needed by a unit varies, and it is essential to read the manufacturer’s instructions on the model you purchase.

In terms of how many amps a space heater uses, it is usually best to research the specific heater’s model. Every space heater is different and will require a different amount of power. To determine the size of the circuit breaker needed to power your space heater, you must consider the amperage output of your device. Your home’s circuit breaker box will indicate the amperage of each switch as well, which will tell you the exact amperage used by your space heater.

When purchasing a space heater, be sure to inspect the wattage to determine its amperage use. As a rule of thumb, for every 1,000 watts of power, you will need 8-10 amps. Additionally, it is important to consider the voltage of the appliance as well. Generally, space heaters require 20-30 volts, depending on the size and strength of the appliance. To ensure proper operation and safety, always purchase a space heater with the appropriate voltage and amperage for your home.

### How many amps does a typical space heater use?

A typical space heater uses about 15 amps of electricity, connecting to a 120 volt outlet. The wattage of a space heater varies depending on the model, but most average to around 1,500 watts. This makes the amps approximately 15, allowing the space heater to operate safely.

### How many space heaters can I run on a 20 amp breaker?

You can run up to three space heaters on a 20 amp breaker. Each heater must not exceed a maximum wattage of 3,840 watts (240 volts x 20 amps). It is important to select the right type of breaker to match the wattage of the heaters.

### Can you run a 1500 watt heater on a 15 amp circuit?

No, a 1500 watt heater cannot be run on a 15 amp circuit. The heater draws 12.5 Amps, which exceeds the circuit’s maximum amperage rating. Drawing too much current on a 15 amp circuit can result in the breaker tripping.

### How many amps does a 1500 watt heater use on low?

A 1500 watt heater on low will typically use 3 amps of current. This is because 1500 watts / 120 volts = 12.5 amps. However, the resistance of the heating elements will reduce the current draw. The typical rule-of-thumb is that on low settings, a 1500 watt heater will draw three times less current, or 3 amps. Therefore, a 1500 watt heater will use 3 amps of current on low settings.

### How many amps does a 900w heater draw?

A 900 watt heater will draw approximately 7.5 amps when connected to a 120 volt power supply, and 3.75 amps when connected to a 240 volt power supply. To ensure the correct current draw for a 900 watt heater, consult the manufacturer’s manual for the exact specifications. It is important to read and understand all safety tips for operating electric heaters to ensure safe and effective performance.

### Can a 15 amp circuit handle a 1500 watt heater?

No, a 15 Amp circuit cannot handle a 1500 Watt heater. When the heater and any other light or appliance are all plugged into the same circuit, the 15 Amp limit is quickly reached and the breaker will trip. It is important to always ensure the total wattage of the circuit does not exceed the amperage rating.

### How many amps is a small space heater?

A small space heater typically uses 15 amps of electricity and connects to a 120 volt outlet. The wattage can vary depending on the model, but is usually around 1,500 watts. To calculate the amperage, divide the wattage (1,500 watts) by the voltage (120 volts) to get the amperage (15 amps).

### How many amps is a 500 watt space heater?

A 500 watt space heater will draw 4.5 amps at 110 volts or 4.2 amps at 120 volts. This is the amount of electrical current necessary to power the heater. The amount of current the heater will use depends on the voltage of the power source.

### How do you calculate the amperage of a heater?

The amperage of a heater can be calculated by dividing the total heat input in Watts (kW x 1000) by the voltage. For single phase heaters, this calculation is typically done using the equation amps = (kW x 1000) / volts. For three phase heaters, the calculation is typically done using the equation: amps = (kW x 1000) / (1.732 x volts). The amperage of a heater determines the strength of the current flowing through the device, and should be chosen carefully to ensure proper performance and safety.

### How do I calculate what size heater I need?

To calculate what size heater you need for a room, you will need to determine the room’s cubic footage. Multiply the length times the width times the height to calculate the volume in cubic feet. Once you have this measurement, multiply the room’s cubic footage by 4 if its walls contain fewer than 3 inches of insulation. Finally, use this number to select and purchase the properly sized heater.

### How many amps is a 1500 watt heater?

A 1500 watt heater will draw 12.5 Amps of current. This exceeds the typical 15 Amp limit of most circuits, meaning it can cause a breaker to trip if combined with other appliances. In summary, a 1500 watt heater needs 12.5 Amps of current to operate.

### How big of a room will 1500 watts heat?

A 1,500-watt heater can be the primary heat source for an area up to 150 square feet. This means that a room measuring this size will be able to be heated by a heater of this power. As a result, a 1500 watt heater will be able to heat a room of up to 150 square feet.

## Final Thoughts

The amount of amps used by a space heater will largely depend on the amount of power required to effectively heat the room it is placed in. A typical space heater in a moderate sized room using a standard 120-volt outlet circuit may use up to 15 amps. Higher powered units which could be used in larger rooms or uninsulated areas may draw more and require up to 20 or more amps. Knowing the wattage, voltage and other pertinent details about a specific heater model will give an exact idea of the number of amps it draws.