Heaters that run on combustible fuels like propane, natural gas, or kerosene put out the most overall heat, measured in British Thermal Units (BTUs). For high-heat applications, portable torpedo and convection heaters produce staggering amounts of warmth—typically ranging from 50,000 to over 200,000 BTUs.
For the lowest electricity consumption, choose low-wattage heaters (200W to 500W) or models with built-in ECO modes and thermostats. Standard space heaters pull 1500W, but low-wattage units reduce energy use by targeting only your immediate personal space instead of the whole room.
Regardless of the cost, here's the kicker: all 750-watt or 1,500-watt heaters produce the same amount of heat!
The best room heater depends on your space and heating needs. The Dreo Solaris Slim H3 is the best overall for fast, quiet heating. For energy efficiency, the Envi Smart Wall Heater is top-tier. If you want budget-friendly performance, the Amazon Basics Ceramic Heater is ideal.
Running a 1500-watt (1.5 kW) heater for 24 hours consumes 36 kWh of electricity. Nationwide, this typically costs between $𝟑.𝟔𝟎 and $𝟖.𝟔𝟒 per day, depending on your local energy rates and how often the heater's thermostat cycles the heating element on and off.
Cheapest ways to heat your home
Heating and cooling (HVAC) systems are the biggest energy consumers in a typical house, accounting for roughly 45−50% of your total electricity usage. Water heaters, refrigerators, and lighting round out the rest of the major draws.
It takes time for your home to warm up and cool down. If you're not sure how long it takes, try turning the heating on about 30 minutes before you need it. You should turn it off 30 minutes before you'll stop needing it.
Conclusion. So, after looking at the different types of electric heaters available, due to its lower power-output, halogen heaters are the cheapest electric heaters to run.
This means a 1500-watt heater can effectively heat a room of up to 150 square feet.
We can clearly see that at around 800W loading, the 1500W power supply is more efficient, therefore drawing less power. Some may argue that during system idle, the 1000W power supply is more efficient so overall power draw is still lower than 1500W.
To heat a 24x24 foot (576 sq. ft.) garage, you will generally need between 30,000 and 45,000 BTUs. The exact amount depends heavily on your local climate, ceiling height, and insulation levels.
In the US, almost all plug-in space heaters draw the same maximum power (around 1,500 watts) because of standard outlet limits. The most energy-efficient options feature precise thermostats, ECO modes, and targeted air circulation to reduce overall runtime, while low-wattage models (200W–500W) provide lower, continuous heating for smaller spaces.
- Oil Filled Radiators: These are silent and long-lasting and best suited to medium and large-sized rooms. - Halogen Heaters: Give immediate heat and are suitable for small areas and warm fast. - Fan Heaters: Fan heaters can be used to provide a fast distribution of heat, but they are noisier than the others.
Unlike traditional fan heaters that rely mainly on heating elements and forced air, ceramic heaters are known for being more efficient, quieter, and safer—thanks to their self-regulating ceramic components. In short, a ceramic heater uses electricity to warm ceramic plates, which then radiate heat into the room.
In most homes, Heating and Cooling (HVAC) systems drive the highest energy costs, accounting for nearly 40% to 50% of your total electricity bill. Following these, the appliances that run up your bill the most include water heaters, refrigerators, and laundry machines.
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.
Known for his practical tips, Lewis introduced the '4pm rule' which involves using curtains strategically to retain heat. He suggests opening curtains when the sun rises at around 8:30am to let in natural warmth, and closing them by 4pm to keep the heat inside.
The Top Energy-Draining Appliance: Space Heating & Cooling
This includes both forced-air systems, heat pumps, furnaces, baseboards, window A/C units, and fans. Because they run for long periods and often at high wattage, they dominate the consumption profile.
Electric heating systems and tumble dryers tend to be the most expensive electrical items to run because they use large amounts of power over extended periods. Other high-cost appliances include electric ovens and immersion heaters. Using these efficiently and during off-peak hours can help reduce costs.
Because they do not use standard grid electricity or conventional electric and gas furnaces, the Amish heat their homes using off-grid, self-reliant methods. The most common systems include wood- or coal-burning stoves, propane and kerosene heaters, and natural airflow home designs.
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.
Set your thermostat to 68°F while you are awake and at home. When you are asleep or away from the house, lower it by 7°F to 10°F for eight hours to maximize savings.