Is an Electric Heater Cheaper Than Gas?

Why Natural Gas Heats a Whole Home for Less Money

Natural gas costs less than electricity per unit of heat in nearly every part of the country. When your utility company bills you for gas, they charge you by the therm, which is a unit that delivers about 100,000 British Thermal Units (BTUs) of heat energy. Electricity bills measure kilowatt-hours, where one kilowatt-hour yields roughly 3,412 BTUs of warmth. When you convert those measurements into equal amounts of heat, standard residential electricity usually costs three to four times more than pipeline natural gas.

Electric heaters often boast that they are 100 percent energy efficient, and technically, that claim is true. Every watt of electrical power pulled from your wall outlet turns directly into heat inside the room without any lost energy. Central gas furnaces lose some heat through their exhaust vents, typically running between 80 and 95 percent efficiency depending on the age and design of the system. Even with that small exhaust loss, burning natural gas produces raw heat so cheaply that the furnace wins the overall cost battle by a wide margin.

Warming an entire house requires a massive amount of heat energy to offset the cold air pushing against your exterior walls, windows, and roof. If you tried to warm a typical 1,800 square foot home using portable electric heaters, you would need six or seven units running on their high 1,500-watt power level at the same time. That setup would pull an enormous amount of power, risk overloading your household electrical circuits, and cause your monthly power bill to skyrocket. A central natural gas furnace heats that entire space through your ductwork for a fraction of the cost.

The Zone Heating Exception: When Electric Actually Saves Money

Electric heaters become cheaper only when you stop trying to heat your entire house and practice zone heating instead. Zone heating means warming just the specific room you are using while letting the rest of the house stay much cooler. If you live in a multi-room house but spend your evenings sitting in the living room or sleeping in a closed bedroom, keeping the central gas furnace running to warm empty guest rooms, hallways, and unoccupied bathrooms wastes fuel.

The math swings in your favor when you turn down your central thermostat by 5 to 10 degrees Fahrenheit, such as dropping it from 70°F down to 62°F. Turning down the central thermostat cuts the runtime of your large gas furnace dramatically throughout the day or night. You then place a single portable electric heater in your immediate room to supply warmth right where you sit. A standard 1500W heater warms a closed 150 sq ft bedroom or provides targeted warmth right beside your favorite chair while sipping a fraction of the energy required to warm the whole structure.

Zone heating also solves comfort problems in isolated living areas without forcing you to overheat the rest of the house. For drafty additions or three-season rooms where central heating ducts do not reach, choosing the best heater for enclosed porch spaces allows you to keep family areas warm on demand instead of wasting gas turning up the central furnace. The golden rule of zone heating is balance: you only save money if the gas furnace stays turned down. If you run electric space heaters while leaving your central gas thermostat at 72°F, you are simply adding a hefty electric bill on top of your existing gas bill.

How to Compare Your Gas and Electric Rates in Four Steps

Energy rates vary widely across different states and utility providers. Following these four steps will help you calculate your exact local heating costs and verify whether zone heating will lower your monthly expenses.

1. Find your true electric rate per kilowatt-hour on your latest power bill. Take the total dollar amount of your monthly electric bill and divide it by the total kilowatt-hours (kWh) consumed that month. Reason: Power bills separate supply charges from distribution fees and local taxes, so dividing the total bill amount ensures you calculate with your true all-in rate rather than an artificially low base supply rate.
2. Find your natural gas rate per therm on your gas statement. Locate the total dollar charge on your gas bill and divide it by the therms used during that billing cycle, or divide by hundred cubic feet (CCF) if your utility uses volume billing. Reason: Gas utilities also tack on delivery charges and customer service fees, so using your total cost per therm reveals what you genuinely pay for every unit of heat burned.
3. Convert your electricity cost to match the heat in one therm of gas. Multiply your all-in electric rate per kilowatt-hour by 29.3. Reason: One therm of natural gas equals roughly 29.3 kilowatt-hours of electrical heat energy, so multiplying your kilowatt-hour rate by 29.3 shows you what that same volume of heat would cost if generated entirely by electric resistance.
4. Compare your space heater hourly run cost against furnace savings. A standard portable electric heater running on its high setting uses 1,500 watts, which equals exactly 1.5 kilowatt-hours of electricity for every hour of continuous operation. Multiply 1.5 by your kilowatt-hour rate from step one to see your hourly cost. Reason: If running that small heater costs you 25 to 35 cents per hour, but lowering your central thermostat keeps your gas furnace from firing for two cycles each hour, you pocket real dollar savings every single day.

If your calculation in step three shows that 29.3 kilowatt-hours of electricity costs four dollars in your area while a therm of natural gas costs only one dollar and thirty cents, heating your whole home with electricity makes no financial sense. But knowing that a single room heater costs only a quarter or thirty cents an hour gives you confidence that turning your central furnace down at night will produce genuine savings on your net utility costs.

Piped Natural Gas Versus Propane: How Bottled Fuel Changes the Math

The financial comparison shifts dramatically if your home uses propane instead of piped utility natural gas. Natural gas flows continuously into your home through underground pipes managed by a city utility, which keeps the base price relatively low and stable. Propane is delivered by a fuel truck and pumped into a large outdoor storage tank on your property, or bought in portable metal cylinders from retail exchange racks.

Propane is sold by the gallon rather than the therm. One gallon of propane contains about 91,500 BTUs of heat energy, which is slightly less than a single therm of natural gas. Because propane must be processed, trucked over roads, and stored in pressurized tanks, its price per gallon is often significantly higher than natural gas. During harsh winter storms or periods of high regional demand, delivery fees and fuel prices can spike unpredictably, making whole-home propane heating expensive.

In homes heated with propane, electric space heating becomes a much tighter race. In rural locations or workshop outbuildings where propane furnace costs run high, running an efficient electric space heater for targeted zone warmth can match or even beat the cost of burning bottled propane. If you are heating an unattached workshop, garage, or hobby room where trenching a gas line is impractical, selecting the best electric heater for garage with thermostat lets you maintain reliable, freeze-preventing warmth without burning through expensive propane supplies.

Upfront Costs, Maintenance, and Indoor Safety Trade-Offs

Fuel cost per hour is only one part of the financial equation. Deciding between gas and electric heat also involves initial equipment purchases, annual maintenance upkeep, and everyday home safety.

• Equipment and installation costs: A portable electric space heater requires no professional installation and plugs directly into a standard wall outlet. In contrast, installing or replacing a central gas furnace, ductwork, and gas supply piping costs thousands of dollars in equipment, permits, and professional labor.
• Routine maintenance demands: Central gas furnaces require annual filter changes, professional burner cleaning, and regular chimney or vent pipe inspections to ensure safe combustion. Portable electric space heaters require minimal upkeep beyond wiping down the cabinet and vacuuming dust buildup from the air intake grilles.
• Indoor air quality and venting: Natural gas produces combustion byproducts, including moisture and dangerous carbon monoxide gas, which must vent safely through exhaust pipes out of your roof or side wall. Homes with gas appliances must have certified, working carbon monoxide alarms on every floor. Electric space heaters produce zero indoor fumes or exhaust gases, keeping indoor air clean.
• Electrical draw and outlet safety: Standard portable space heaters pull 1,500 watts, which equals roughly 12.5 amps on a standard 120-volt household circuit. You must always plug a space heater directly into a dedicated wall outlet on a 15-amp circuit breaker. Never plug a space heater into an extension cord, power strip, or surge protector, because those intermediate connections can overheat, melt, and spark an electrical fire.
• Clearance and fire prevention: Keep a strict 3-foot safety buffer around all sides of your space heater, keeping it well away from bedding, drapes, upholstered furniture, and paper. If a wall outlet ever feels hot to the touch, shows brown scorch marks, or repeatedly trips your circuit breaker, turn the unit off, unplug it immediately, and call a licensed electrician before using that outlet again.

What to Look for in an Electric Space Heater for Zone Heating

If you want to use an electric heater to lower your winter gas bills through zone heating, picking the right type of unit makes all the difference. Look for a model featuring a ceramic heating element that warms up in seconds paired with a fan that pushes warm air across the room. Ceramic heating elements deliver fast, focused warmth right where you need it, making them ideal for small living rooms, bedrooms, and home offices.

Precise temperature control is essential to prevent wasting expensive electricity. Choose a unit with a digital temperature dial that clicks on and off to hold your set warmth automatically, rather than a basic dial that runs on maximum power continuously. Models offering multiple heat settings, such as a 750W low power level and a 1500W high power level, let you maintain comfortable room temperatures using less power once the initial chill is gone. Programmable auto-off timers are also valuable for warming a bedroom as you fall asleep without running the heater all night long.

Safety features should always come first when selecting a portable heater for indoor use. Verify that the unit includes an automatic overheat sensor that shuts the unit off if internal parts get dangerously hot due to blocked airflow. Look for a responsive tip-over safety switch that cuts power instantly if the unit is knocked over or tilted by pets or children. Finally, check the product label to ensure the heater carries a recognized safety certification mark, such as UL, ETL, or CSA, confirming it meets rigorous electrical standards.

1

Dreo Space Heater, Portable Electric Heaters for Indoor Use with

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• BWP Score

  BWP Score is a ranking system developed by Bestwinterproducts.com. BWP score has no relationship or impact from any manufacturers or sales agent websites. Learn more

  7.4
• Brand
  DREO

Key specs2

Thermostat control

Digital thermostat adjusts from 41 to 95 degrees Fahrenheit in 1-degree increments, allowing exact target temperatures to prevent overheating small rooms.

Remote operation

Included remote for adjusting settings from across the room

Pros & cons42

Pros

• Includes a remote control to adjust heat, timer, and modes from across the room without standing up
• NTC chipset provides precise thermostat adjustments from 41 to 95 degrees Fahrenheit in 1-degree steps
• Weighs only 3.04 pounds with a 6.02-inch footprint, making it easy to carry between rooms for zone heating
• Brushless DC motor operates down to 34 decibels to reduce disturbance in bedrooms and home offices

Cons

• 1500W draw consumes significant circuit capacity, requiring a dedicated wall outlet without shared heavy loads
• Compact ceramic element heats air rapidly but retains no residual warmth once switched off

2

Dreo Space Heater, Portable Electric Heaters for Indoor Use with

View on Amazon

• BWP Score

  BWP Score is a ranking system developed by Bestwinterproducts.com. BWP score has no relationship or impact from any manufacturers or sales agent websites. Learn more

  9.3
• Brand
  DREO

Key specs2

Placement footprint

7.32 x 7.32 x 11.02 inches, weighing 3.5 pounds

Quiet fan performance

Brushless DC motor and winglet fan produce operating noise down to 34 decibels, offering quiet airflow for personal heating while central gas heat is set low.

Pros & cons42

Pros

• Broader 7.32-inch base and 3.5-pound weight provide stable placement on desks or flat floors
• Integrated digital panel features a 1 to 12 hour shut-off timer, ECO mode, and a child lock
• ETL-certified safety includes an advanced tilt-detection sensor, flame-retardant housing, and overheat protection
• Low 34-decibel operating level minimizes fan disruption when zone heating a bedroom at night

Cons

• Product listing does not include a remote control, requiring manual adjustments directly on the device
• High 1500W draw means running multiple units simultaneously can quickly cancel out central gas savings

Last update on 2026-10-03 / Affiliate links / Images, Product Titles, and Product Highlights from Amazon Product Advertising API

FAQs

Why is gas heat cheaper if electric heaters convert all power into heat?

Electric heaters convert 100 percent of their electrical power into heat, but electricity costs much more to buy than natural gas. Power plants burn fuels like coal or natural gas to generate electricity, losing energy along transmission lines before it reaches your home. Natural gas is piped straight to your home and burned on site, making raw gas heat far cheaper per unit than electricity.

Can using a space heater in one room really lower a gas heating bill?

Using a space heater lowers your overall bill only if you turn down your central gas thermostat by 5 to 10 degrees. Lowering the central thermostat keeps your main gas furnace from running frequently to heat empty rooms. The money you save on furnace fuel will easily outweigh the small amount of electricity consumed by warming that one occupied space.

Is an electric heater cheaper to run than a portable propane heater?

Operating costs between electric and portable propane heaters are often very close because bottled propane is significantly more expensive than utility natural gas. In areas with high fuel delivery rates or retail cylinder exchange fees, a portable electric space heater can be cheaper and more convenient to run than propane. Electric heaters also produce no moisture or carbon monoxide indoors, making them cleaner for residential rooms.

Can I plug an electric space heater into an extension cord to reach my favorite chair?

You should never plug an electric space heater into an extension cord, power strip, or multi-outlet adapter. A standard space heater draws around 12.5 amps continuously on high, which can cause typical household extension cords to overheat, melt their insulation, and ignite nearby carpet or curtains. Always plug your heater directly into a permanent wall outlet and maintain a clear 3-foot buffer around the unit.