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HVAC • 120 Volts

How Many Watts Does a Electric Space Heater (1500W) Use?

On average, a Electric Space Heater (1500W) consumes 1,500 running watts during normal continuous operation. However, when the motor or compressor starts, it requires an inrush surge of 1,500 starting watts.

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⚡ Electrical Specifications Quick Card

Continuous Running 1,500 Watts
Starting / Surge Peak 1,500 Watts
Operating Voltage 120 V AC
Continuous Amps 12.5 Amps
Daily Consumption 6.75 kWh/day
Average Monthly Cost $32.85/mo

Understanding Electric Space Heater (1500W) Power Draw & Surge Watts

Electric space heaters are purely resistive heating elements, meaning they draw zero starting surge beyond their rated running wattage.

Generator Sizing Note:

Requires a minimum 2000W continuous generator. Avoid using thin extension cords as 12.5A continuous draw creates fire hazards.

View Dedicated Generator Sizing Guide for Electric Space Heater (1500W) →
Interactive Tool v2

Electric Space Heater (1500W) Power & Outage Calculator

Hourly $0.00
Daily $0.00
Monthly $0.00
Yearly $0.00
Smart Outage Recommendations

Best Generators & Power Stations to Run a Electric Space Heater (1500W)

Selected specifically to comfortably handle the 1500W surge requirement plus a 20% safety buffer.

Westinghouse Budget Generator

Westinghouse WGen4500DFc Dual Fuel Inverter

Rated Continuous 3,700W
Surge Peak 4,500W
Output & Fuel Dual Fuel (Gas/Propane) • 120V

Provides sufficient peak surge (4500W) to start the 1500W load safely.

Est. Price $549
View on Amazon →
Champion Most Popular Inverter

Champion 4650-Watt Dual Fuel Inverter Generator

Rated Continuous 3,800W
Surge Peak 4,650W
Output & Fuel Dual Fuel (Gas/Propane) • 120V

Clean sine wave power with high surge headroom (4650W) for sensitive electronics.

Est. Price $799
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Anker SOLIX Clean Solar / Battery Backup

Anker SOLIX C1000 Portable Power Station

Rated Continuous 1,800W
Surge Peak 2,400W
Battery Capacity 1,056 Wh

Silent indoor power station offering 1056Wh capacity with zero exhaust or gas maintenance.

Est. Price $699
View on Amazon →

Electric Space Heater (1500W) Electricity Cost in Key US States

Compare the monthly and annual cost of running this appliance across major states based on official U.S. EIA residential electricity rates.

State Average Rate (¢/kWh) Daily Cost Monthly Cost Annual Cost Detailed Breakdown
California (CA) 31.8¢ $2.15 $65.37 $784.46 View CA Report →
Florida (FL) 15.5¢ $1.04 $31.78 $381.39 View FL Report →
Hawaii (HI) 43.3¢ $2.92 $88.80 $1065.57 View HI Report →
Illinois (IL) 16.4¢ $1.11 $33.77 $405.29 View IL Report →
New York (NY) 23.6¢ $1.60 $48.56 $582.68 View NY Report →
North Carolina (NC) 13.8¢ $0.93 $28.41 $340.98 View NC Report →
Ohio (OH) 15.8¢ $1.07 $32.48 $389.77 View OH Report →
Pennsylvania (PA) 18.1¢ $1.22 $37.20 $446.43 View PA Report →
Texas (TX) 14.6¢ $0.99 $30.08 $360.94 View TX Report →
Washington (WA) 11.5¢ $0.77 $23.51 $282.10 View WA Report →

Frequently Asked Questions

Does a 1500W space heater have surge watts?

No. Space heaters use resistive Nichrome coils, so starting watts equal running watts (1500W).

How much does it cost to run a space heater for 8 hours?

At 1500W, running it for 8 hours consumes 12 kWh. At /usr/bin/bash.16/kWh, that is approximately .92 per day or 7 per month.