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How many amps does a gas furnace use?

Asked by Susan Skelton on December 28, 2021

Categories: Home and garden Indoor environmental quality


Rating: 4.8/5 (69 votes)

Most gas heat furnaces use less than 600 watts of electricity, or_less than half of a typical 15 amp electric circuit.

How many amps does a dryer use? 30 amps

How many watts does it take to run a furnace? 15,000 watts

How many amps does 5kw draw? Watts and amps conversions at 12V (DC)

Power Current Voltage
5 watts 0.417 amps 12 volts
10 watts 0.833 amps 12 volts
15 watts 1.25 amps 12 volts
20 watts 1.667 amps 12 volts

What size breaker do I need for a 1500 watt heater? A 1500-watt heater on a 120-volt circuit thus needs a breaker of 15.6 amps. Because a 15-amp breaker would be too small, you need a breaker with the next highest rating, which is 20 amps. Include the current draw of any other devices on the circuit when calculating the breaker-size.