A 1200-watt heater is great for warming small to medium spaces like bedrooms, offices, or dorms (up to 150-200 sq ft). It provides targeted, efficient personal warmth without overloading standard electrical circuits, making it a reliable and cost-effective choice for localized heating.
In short, yes, space heaters do use a lot of electricity. Depending on the size and type of space heater, it can use anywhere from 500 watts up to 1500 watts when running on full power. This amount of power is higher than other small electrical appliances like TVs, fans, and CFL bulbs.
For asthma patients, the best room heaters are those that do not burn fuel, produce smoke, or use forceful fans that circulate dust and dry out the air. Oil-filled radiators and infrared (quartz) heaters are highly recommended because they provide quiet, clean, and consistent warmth without aggravating respiratory issues.
1500 watts will heat spaces up to about 150 square feet and can help you stay warm and toasty in a medium-sized room, office, kitchen, or modest-sized living room.
Running a 1,500W heater continuously for 24 hours consumes 36 kilowatt-hours (kWh) of electricity. Assuming the national average electricity rate of about $0.16 to $0.17 per kWh, it costs between $𝟓.𝟕𝟓 and $𝟔.𝟏𝟓 per day. Over a month, this adds roughly $170 to $185 to your utility bill.
Most electrical space heaters that you find will use about 1,500 watts per hour, while central air conditioners installed in houses can use 10x that, reaching 15,000 watts per hour. For comparison, a desktop computer and monitor use about 400 watts per hour.
Heating and cooling (HVAC) systems are the biggest energy consumers in a typical home, accounting for about 40–50% of your total electricity bill. Water heating, refrigerators, and lighting follow closely behind.
The "30-minute heating rule" is a highly efficient, money-saving thermostat strategy that involves turning your heating system on 30 minutes before you need a space warmed up, and turning it off 30 minutes before you no longer need it.
The cheapest heaters to run are generally low-wattage personal heaters, such as halogen heaters or, for larger spaces, oil-filled radiators and infrared heaters that feature, or can be used with, adjustable thermostats to regulate energy consumption. Energy-efficient personal heaters like the Comfort Zone CZ35E are cost-effective choices for localized heating.
Oil-filled radiators are considered one of the healthiest room heater options because they don't burn oxygen or dry out the air, making them ideal for asthma and allergy sufferers.
The 4-4-4 asthma rule is a simple, lifesaving first-aid protocol used to treat an asthma attack. It involves a four-step process: administer 4 puffs of a rescue inhaler, wait 4 minutes to assess for improvement, and repeat 4 more puffs if symptoms persist.
The most significant downfall of indoor heating is that it causes the air to dry out. Our lungs have to stay moist in order to function properly. Exposure to dry air for a prolonged period of time can cause wheezing, shortness of breath, and other respiratory problems.
In most homes, heating and cooling (HVAC) runs up your electric bill the most, accounting for about 40% to 50% of your total energy use.
If your home uses electricity for central heating, the cost is likely still cheaper than running space heaters. According to Scerbo, “Buying a space heater for every room would increase the electricity bill more than if you had just bumped up the thermostat.”
Whether 1200 W (1.2 kW) is a lot depends entirely on the context.
For most customers, we recommend turning on your furnace when the weather is consistently below 18° Celsius, which usually happens to be around the end of September, or early October. Some homeowners try to put off turning on their furnace as long as they can to save money, which is okay if you're healthy adults.
Heating and energy expert Stephen Hankinson said that one "big energy cost saver" is to make sure you have your heating off when you're not at home. For instance, if you typically arrive home from work at around 6pm on weekdays, you could set your heating to activate just as you walk through the door.
To keep your house warm in winter, prioritize blocking drafts and maximizing natural heat. Seal windows and doors with weatherstripping, use rolled towels or draft stoppers, and insulate glass with shrink film. Let sunlight warm south-facing rooms during the day, and close thermal curtains at night.
Your home's biggest energy drainer is your HVAC system (heating and cooling). However, if you are asking about individual plug-in devices, water heaters and clothes dryers dominate active energy use, while cable boxes and small kitchen appliances are the worst "phantom" energy vampires.
Your HVAC system (Heating, Ventilation, and Air Conditioning) is the primary appliance that causes electric bills to spike or even double. Because they cycle frequently, run for long periods, and consume high wattage, space heating and cooling make up nearly half of an average home's total energy consumption.
Keep your home warm without spiking your electric bill
Most space heaters have a maximum capacity of 1,500 watts, which is generally considered the highest wattage safe for a typical home's electric system. While that may not seem like a lot, refrigerators only use about 300-800 watts (depending on the size and model).
A 1500-watt heater typically heats a room up to 150 square feet (as a primary heat source) or up to 250 square feet (if used as supplementary heat alongside a central system). This capacity is ideal for small to medium-sized bedrooms, home offices, or dorms.
1,500W Heater Operating Costs:
Hourly: $0.25. Daily (8 hours): $1.97. Monthly (8 hours/day, 30 days): $59.18.