Infrared heaters use about the same electricity as other portable electric heaters — most are still rated up to 1,500 watts, or roughly 1.5 kWh per hour on full power. They are not lower-wattage; their advantage is that they heat people and objects directly, so you often feel warm at a lower setting.
How much power does an infrared heater draw?
An infrared heater is still an electric resistance appliance, so most plug-in models cap out at 1500 watts on standard household power. That's the same ceiling as a typical space heater of any type. Infrared doesn't lower the wattage; it changes where the heat lands.
Two elements dominate the category. Quartz tubes glow bright and heat up almost instantly, while a carbon element runs cooler and dimmer but still converts electricity to heat at nearly the same rate. Neither design turns watts into heat more efficiently than the other.
Quartz vs carbon element
Quartz elements produce visible orange light and reach full output within seconds, which suits garages and workshops. Carbon elements run at a lower surface temperature and glow less, a common choice for living rooms where a bright filament feels intrusive.
Far infrared vs near infrared heat
Far infrared wavelengths penetrate skin only slightly and warm the surface gently, while near infrared — what quartz tubes emit — feels hotter and more direct. Far infrared panels are popular for silent, low-glow supplemental heat in bedrooms and offices.
Why does radiant heat feel more efficient than a space heater?
Radiant heat warms people and objects directly, like sunlight through a window, instead of heating the surrounding air first. A conventional space heater must raise the whole room's air temperature before you feel warm, which wastes energy on air near the ceiling nobody touches.
That directness is why infrared heaters feel efficient rather than actually using less electricity. Standing in the beam gives instant heat, so you can run a lower thermostat setting for the same comfort, cutting your effective running cost without the unit sipping fewer watts.
Instant heat vs slow warm-up
A quartz or carbon element reaches near-full output within seconds of switching on, unlike a convection space heater that needs minutes to warm a room's air. That instant heat matters most in a garage or workshop where you only need warmth for a short visit.
What running costs come with 1500 watts of heater output?
At full 1500 watts, an infrared heater draws about 1.5 kWh every hour, the same as any other electric heater at that wattage. Multiply 1.5 by your utility's per-kWh rate to estimate hourly running cost — commonly somewhere between 20 and 35 cents depending on where you live.
Because cost tracks watts and hours rather than heater type, the only real lever is runtime and setting. A unit dialed to 750 watts for half the time an ordinary space heater might otherwise run costs roughly a quarter as much for the same evening.
Multi-hour comparisons make the pattern clearer. Running a 1500-watt heater for a full eight-hour night costs around 12 kWh, while the same heater cycling on a thermostat for half that time uses roughly 6 kWh. Small changes in setting and schedule compound fast over a heating season.
BTU output and energy efficient ratings
A 1500-watt heater outputs about 5,100 BTU, a figure useful for comparing across brands like Dr Infrared, Duraflame, and Heat Storm. None of these convert electricity into heat at a meaningfully different rate, since resistance heating is close to 100% energy efficient by definition.
Is an infrared heater silent enough for a garage heater setup?
Most infrared heaters have no fan, so they run silent apart from a faint electrical hum, which suits a garage heater used while you work nearby. LifeSmart and similar panel models are popular exactly because they add warmth without competing with power tools or conversation.
A fan-forced infrared hybrid trades some of that silence for faster air movement, useful in a larger garage bay. For a small workbench area, a silent radiant panel mounted overhead usually delivers enough comfort without the noise.
Thermostat, tip-over, and overheat protection
Look for a built-in thermostat so the unit cycles instead of running flat out, plus tip-over and overheat shutoff switches. These safety features, standard on EPA-compliant modern models, matter more in a garage, where a heater can sit near clutter or an unattended workbench.
How does zone heating cut your electric bill?
Zone heating means warming only the room or spot you occupy instead of the whole house, and infrared is naturally suited to it. Point the heater at your desk or chair, turn down central heating elsewhere, and the electric savings come from heating less space, not a more efficient watt.
Used this way, an infrared heater can genuinely lower a winter bill even though its wattage is ordinary. The saving is behavioral: less square footage kept warm, shorter runtimes, and a lower thermostat setting in rooms you aren't using.
A household running one infrared heater in an occupied room, with central heat trimmed a few degrees elsewhere, often reports a noticeably lower monthly bill than running the whole-home system harder. The heater itself isn't the efficient part — the smaller heated footprint is.
See our infrared heaters guide, our primer on how to heat and cool a room efficiently, and How We Rank.