Best Energy Efficient Portable Heaters (2025 Update)

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If you’re looking for a way to keep your home warm without breaking the bank, then an energy-efficient portable heater might be just what you need. These heaters are designed to provide high levels of warmth while consuming less energy than traditional heaters. However, with so many options available on the market, it can be challenging to choose the best one for your needs.

Before buying an energy-efficient portable heater, there are several factors you need to consider. First, you need to determine the size and layout of the space you want the heater to warm. This will help you choose the appropriate size and power of the heater you need. You also need to consider safety features, such as automatic shut-off and tip-over protection, to prevent accidents in case the heater falls. Finally, you should check if the heater has energy-saving features such as programmable thermostat or eco-mode.

Are you tired of paying high electricity bills to keep your home warm? Do you want to find a more cost-effective solution that doesn't compromise your comfort? If so, keep reading! In this article, we will go over some of the best energy-efficient portable heaters available on the market. We’ll share their features, pros, and cons so you can make a more informed decision. Are you ready to enjoy warmth and comfort without the high price tag? Let's dive into the world of energy-efficient portable heaters!

10 Best Energy Efficient Portable Heaters

# Product Image Product Name Product Notes Check Price
1
Ideal for providing powerful and safe heat in a portable or wall-mounted design, with energy-saving dual-heat system and child/pet safety features.
2
The product is ideal for heating small indoor spaces such as bedrooms and offices, with energy efficiency and safety features.
3
This product is ideal for heating indoor spaces and offices while also being energy-efficient and safe with overheating and tip-over protection.
4
This product is ideal for heating small indoor spaces like offices, basements, and homes efficiently with a remote control.
5
This product is ideal for providing energy-efficient heating and safety protection in small spaces such as bedrooms, bathrooms, dorms, and offices.
6
This product is ideal for indoor use as a quiet and efficient space heater with multiple safety features.
7
Ideal for heating small spaces such as bedrooms, camping tents, RV trailers, and offices while being energy-efficient and safe.
8
This product is ideal for heating small spaces such as offices, bedrooms, and bathrooms with its energy-efficient and adjustable features.
9
This product is ideal for providing energy-efficient heating to small indoor spaces like offices and homes.
10
Ideal for providing energy efficient heating in indoor spaces such as offices, homes, and bedrooms with adjustable thermostat and safety features.
Ideal for providing powerful and safe heat in a portable or wall-mounted design, with energy-saving dual-heat system and child/pet safety features.
The product is ideal for heating small indoor spaces such as bedrooms and offices, with energy efficiency and safety features.
This product is ideal for heating indoor spaces and offices while also being energy-efficient and safe with overheating and tip-over protection.
This product is ideal for heating small indoor spaces like offices, basements, and homes efficiently with a remote control.
This product is ideal for providing energy-efficient heating and safety protection in small spaces such as bedrooms, bathrooms, dorms, and offices.
This product is ideal for indoor use as a quiet and efficient space heater with multiple safety features.
Ideal for heating small spaces such as bedrooms, camping tents, RV trailers, and offices while being energy-efficient and safe.
This product is ideal for heating small spaces such as offices, bedrooms, and bathrooms with its energy-efficient and adjustable features.
This product is ideal for providing energy-efficient heating to small indoor spaces like offices and homes.
Ideal for providing energy efficient heating in indoor spaces such as offices, homes, and bedrooms with adjustable thermostat and safety features.

1. Heatstyle 2-Way Space Heater – Safe & Powerful.

Introducing the HeatStyle Wall Mounted Heater, a sleek and compact 120 volt heater that maximizes your space while providing fast and efficient heat. This heater is designed to be mounted 24” above the floor to keep it out of the way, but it also comes with retractable legs for a freestanding option. The included remote control adds convenience to your heating experience.

The advanced dual-heat system of this heater combines Infrared Quartz and PTC technologies to heat objects, not the air. This ensures that the heat is distributed quickly and evenly throughout the room. Thanks to the powerful yet quiet blower, you'll be able to feel the warmth in no time.

What sets the HeatStyle Wall Mounted Heater apart is its ability to retain moisture in the air, creating a more comfortable environment for you. Unlike other electric wall heaters and portable space heaters, HeatStyle is designed to help keep the air in your home from becoming too dry.

Safety is always a top priority, and the HeatStyle Wall Mounted Heater has you covered. It features an automatic shut-off function if it's ever tipped over, and the exterior cabinet stays cool to the touch, hiding all heating elements for safe operation. It's also UL certified to comply with safety and sustainability standards, giving you peace of mind while using it.

One of the best things about the HeatStyle Wall Mounted Heater is its ability to save you money. It's designed with superior heat transfer technology that delivers significantly more heat than traditional 1500 watt wall heaters. The adjustable thermostat, 12-hour timer, Night Mode, and ECO setting all help cut down on energy costs, making it an economical choice for any household.

2. Ceramic Desk Heater – Compact And Efficient

Introducing the efficient and powerful Paris-Rhône Compact Ceramic Space Heater, designed to heat small spaces up to 215sq. ft. in a flash. With its energy-efficient PTC ceramic heating elements and fan, this heater can quickly warm up your room, providing you with instant warmth.

This heater features two heat settings, including a low heat mode that operates at 900 watts and a high heat mode that heats up faster and hotter at 1500 watts. You can easily adjust the temperature to your desired level by rotating the knob, without worrying about wasting heat.

Safety is a top priority with the Paris-Rhône heater. Its triple protection design includes V-0 flame retardant ABS materials, built-in tip-over protection, and overheat protection, ensuring safe operation. The power indicator stays on while the space heater is running, so you can easily monitor its operation.

The Paris-Rhône Compact Ceramic Space Heater is also designed to be portable and easy to move from room to room. At only 9.1 inches tall and with an 8.0in x 6.9in footprint, it takes up minimal space and is perfect for tabletop or floor placement. Additionally, its hidden carrying handle makes it effortless to move.

With an air velocity of 8.4ft/s, surpassing the standard 5.6ft/s of other personal heaters, this heater ensures more powerful heating. Moreover, the 9° tilted angle increases the heat distribution to warm your surroundings evenly, providing you with 20% wider heating coverage.

3. Eco 1500w Portable Room Heater

The Dr Zero 90° oscillation space heater is a compact yet powerful heating solution with a minimalist design. It boasts 1500W PTC ceramic heating technology that provides ample heat energy to warm up spaces such as bedrooms, offices, basements, hot yoga studios, and more.

When it comes to safety, this portable heater comes with multiple built-in safety features that include a smart tip-over sensor, overheat switch protection, optional 12-hour timer control, and a sturdy 65-inch long power cord. These features ensure that the heater is safe to use and provide peace of mind during all-day use.

The Dr Zero indoor heater is also an energy-efficient solution for your heating needs. With a built-in precise temperature sensor, the smart ECO thermostat adjusts the heating modes automatically based on the surrounding air temperature. This feature helps you save on energy bills and live more sustainably. You can set the temperature from 49℉ to 95℉.

One of the best features of the Dr Zero indoor heater is its quiet heating technology. It operates at just 40dB, which is almost as quiet as a library. The heater takes noise reduction technology, which makes it 10% quieter than traditional electric heaters. You can enjoy the warm airflow whether sleeping or working without any disturbance.

The Dr Zero 90° oscillation space heater comes with a worry-free two-year warranty. Dr Zero 3 "p"s standard represents professionalism, patience, and a “people-first” attitude. The company is committed to providing outstanding products and top-level customer service. If you have any concerns, please do not hesitate to contact them, and they will provide a satisfactory solution.

4. Ilake Digital Oscillating Space Heater With Remote.

Introducing the 2S Speedy Warmth, a powerful 1500W PTC ceramic space heater that quickly delivers hot air in just 2 seconds. With widespread 90° oscillation, this portable space heater effectively circulates hot air evenly, making it perfect for adding warmth to your living room, home, office, or basement during the cold winter months.

Equipped with 3 heating modes (High/Low/Fan Only), you can comfortably create your personalized warm zone. The smart ECO mode can automatically adjust based on the room's ambient temperature, using less electricity to keep your bedroom warm and cozy for longer periods. You can also set the temperature from 49 to 95°F to achieve the perfect level of warmth for a good night's sleep.

The 2S Speedy Warmth is designed with safety in mind, as it is made of V0 flame-retardant materials and comes with multiple protections, including tip-over and overheat protection. It also features auto-stop heating and quickly cools down once knocked over, ensuring the safety of your children and family.

This electric heater has a stylish and portable back-handle design that sets it apart from other space heaters. The digital readout makes it easy to recognize the room temperature for maximum convenience, and you can even set the timer to run for 1-12 hours. With the included remote control, you can operate different settings without leaving the comfort of your couch.

The 2S Speedy Warmth is a compact yet powerful space heater that is perfect for the whole family during Halloween and Thanksgiving Day. It combines easy-to-use, sleek design, portability, and eco-friendly features in one. Our commitment is to provide you with priority after-sales service, so if you have any questions, please don't hesitate to contact us.

5. Mini Safeheat Portable Ceramic Heater

Introducing the 1000W/500W Energy Efficient Heater, the perfect solution for heating small to medium-sized rooms during the cold winter months. With up to 1000 watts of power, this mini heater is energy-saving and consumes low power, so you can stay comfortably warm without breaking the bank.

Equipped with PTC ceramic heating technology and a high-speed fan, the Potulas heater can provide adequate heat quickly, warming up a small space in minutes. At a noise level lower than 40 dB, this heater is quiet enough to use in a bedroom, office, or living room.

Safety is a top priority, and this heater has got you covered. It features an automatic tip-over shutoff and protection from overheating, making it ideal for households with children and pets. The air outlet of this small space heater has an anti-scalding plastic fence and iron mesh double protection, so you no longer have to worry about burning.

The portable and compact design of this heater is perfect for those who are always on the go. It features a back silica gel handle, making it easy to carry, while the cord material is rubber, which can withstand cold weather. Measuring 5.1 x 3.6 x 6.9 inches, it can be placed just about anywhere in your home.

Controlling the temperature is a breeze with this easy control heater. The portable space heater lets you adjust the temperature from a simple I/II switch, and you can clearly see the heater's status via the indicator light on the switch. Its 5.3 feet long durable cord and 2 prong connection make it great for small areas such as offices, tables, desks, tents, small bedrooms, and more.

6. Quietheat Portable Heater With 4 Modes.

Introducing the versatile and efficient 4 Modes in 1 Portable Space Heater, the perfect solution for keeping your room warm and cozy during winter. With 1500W, 750W, and ECO heating levels, you can easily adjust the temperature to your preference. The ECO mode ensures that the heater maintains an optimal temperature while saving energy, making it an ideal choice for those who want to reduce their carbon footprint.

This portable space heater also doubles as a fan, providing cool air during the summer months. It's the perfect all-year-round appliance for your room. Safety is a top priority, and this space heater has been rigorously tested and certified by ETL for your peace of mind. It has an automatic overheat protection feature that ensures the heater turns off when it reaches a certain temperature. Additionally, it has a tip-over shut down feature that turns off the heater when it tilts, preventing accidents and injuries. The 24-hour auto-off feature ensures that the heater turns off when left unattended, providing an extra layer of safety.

The space heater has inbuilt PTC heating elements that provide instant and stable heating, making it a reliable appliance for your home. It heats up in just one second, ensuring that you won't have to wait long for warmth. The low noise level ensures that it won't disturb your sleep, work, or study. The high definition LED display allows you to read the temperature settings easily, even in low light conditions.

The 4 Modes in 1 Portable Space Heater is designed to be portable and lightweight. With a large carry handle, you can easily move it from room to room or take it with you wherever you go. It's perfect for use both indoors and outdoors, making it an ideal gift for your friends and family during winter or Christmas. Finally, you no longer have to worry about bulky appliances taking up too much space, as this compact space heater is designed to fit in any corner of your room. Choose the 4 Modes in 1 Portable Space Heater for a warm, cozy, and safe home environment.

7. Metkiio Retro Blue Heater – Portable & Energy-Efficient.

The Metkiio indoor heater is the perfect solution to staying warm and cozy during colder days or enjoying a refreshing air blow on warmer days. With its user-friendly design, this indoor heater features three heating modes – 900W high power, 400W medium power, and a cooling fan – to set the optimal temperature.

Safety is a top priority with the Metkiio space heater. It uses PTC ceramic heating technology and refractory materials to provide overheating protection. The heater will automatically turn off when the temperature reaches 167-degree F, and it has a smart design that will shut off when overturned.

Thanks to the advanced ceramic heating technology, this space heater provides faster heating, reaching up to 70-degree F in only 3 seconds! Plus, it’s very quiet, and there are no light functions, so you can sleep, read, study, or nap undisturbed.

The Metkiio personal heater is very compact, measuring only 7.7 x 4.4 x 5 inches, but also powerful and energy-efficient. You can use it to heat up small areas, your office, bedroom, nursery, or take it with you on camping trips, outdoor adventures, or in an RV trailer.

This indoor heater has a stylish and chic retro vintage design that will blend perfectly into any décor. It is not only effective and performant, but also a great addition to any room. Order it for yourself or as a gift for your friends and family this Christmas, Thanksgiving, or for other special occasions.

8. Cozyair Mini Heater For Small Spaces

Introducing an innovative and stylish solution to your heating needs, this mini space heater is a must-have for anyone looking for a compact and efficient heating device. With a sleek and modern design, this small heater is not only functional but also adds a touch of elegance to your space.

Measuring at just 4.9 x 6.3 x 7.6 inches, this mini space heater is the perfect space-saving solution. Its compact design allows it to fit easily into any room in your home, making it ideal for your office, bedroom, or bathroom. You can even move it around with ease, ensuring that you are always comfortable no matter where you are.

The mini space heater offers three adjustable settings, providing you with the flexibility to choose the level of warmth you need. The first setting is a cool wind mode, while the second and third settings provide low-heat (660W) and high-heat (1000W) modes respectively. You can use it as a cooling fan, too, to cool you down when you're feeling too hot.

Safety is a top priority when using any heating device, and this mini space heater is no exception. It features an automatic shut-off mechanism that activates when it gets knocked over accidentally or overheats, making it safe for households with pets. Additionally, the heater has a 6-hour timer that automatically turns off after 6 hours of use, providing you with additional peace of mind.

This mini heater is designed with a flexible heating area, thanks to its adjustable air outlet. You can rotate it up to 15 degrees left or right, allowing you to warm up specific parts of your body quickly. With its fast heating capabilities, this small and mighty device will keep you cozy throughout the winter season.

9. Portable Blaux Heatcore: Ultimate Small Space Solution

The Blast by Blaux Heater is an ultra-portable and powerful small heater designed for indoor use. With a 450 watt motor, this electric portable heater is the perfect solution for creating a warm and comfortable atmosphere for you and your loved ones during winter and cold weather.

This mini heater features a rapid 5-second warming system that delivers 450w of heating power almost instantly. Its ceramic space heater for office is capable of projecting a warm, strong breeze quickly, providing you with a warm, cozy indoor climate in no time.

The downsized, slim design of this small portable heater is 40% smaller than the original Blaux Heatcore space heater, making it ultra-portable and easy to move around. You can experience hot, rapid warming without taking up too much space.

The Blaux Heatcore small space heater for office comes with sleek fluid edges and a contemporary design that allows it to blend seamlessly with different interior décor and furniture. It is the best personal space heater for every home.

Setting up this small electric heater is hassle-free and straightforward. Simply plug it into the wall's power outlet, and heat the air in rapid speed straight out of the box. No complicated instructions or tools needed.

This heater is perfect for heating up spaces in the home like your garage, living room, bedroom, or camper van. You can use it as a portable electric space heater, under desk heater, ceramic heater, or countertop heater.

The Blaux Heatcore Portable Heater is an ETL/UL approved kid-friendly desk space heater that brings you the next generation of safety features, with a tip-over safety switch and rubber feet for added stability. For optimal safety, ensure the small space heater fan is positioned on a flat and even surface.

Forget large space heater office units that cost a fortune to run. Our portable electric heaters for indoor use provide a cost-effective and energy-efficient solution to staying warm in winter.

Whether you live in a colder climate or in accommodation with poor insulation, the Blast by Blaux Portable Heatcore Ceramic Heater is the perfect winter accessory to keep you warm and comfortable all year-round. With advanced heating technology, this desktop heater is made to withstand the toughest cold weather conditions.

10. Compact Heat: Energy-Efficient Desktop Heater

The small portable heater is a versatile and easy-to-use product that can heat any space effectively and distribute heat evenly. With its 2-in-1 function, users can adjust the heater to their desired temperature and fan settings with just one button. The LED indicator light located at the top of the product informs users when the heater is in use.

This desk heater operates quietly, emitting less than 50 decibels of noise, which makes it an ideal choice for creating a peaceful and comfortable environment for sleeping, reading or working. The product can also be tilted up to 45°, allowing users to adjust it to their preferred angle, and the compact size (6.1" x 6.1" x 8.46", 2.2 lbs) makes it easy to place in any room or move around.

The retro and elegant design of this small heater complements any home or office décor while keeping the space warm. The lightweight and powerful product is designed with safety in mind, featuring overheating and tip-over protection, which ensures users' safety, especially those with pets. The bottom anti-slip silicone design makes it more stable and reduces the likelihood of the product falling.

This portable heater uses the latest refractory materials, which not only saves energy but also makes it durable for long-term use. The product is easy to use and doesn't require assembly. The manufacturer also offers excellent after-sale service with a 180-day return policy and a strong and professional customer service team available to answer any questions or concerns.

Best Energy Efficient Portable Heaters FAQs

Are there any safety concerns with using energy-efficient portable heaters?

Yes, there are some safety concerns with using energy-efficient portable heaters. While energy-efficient heaters are designed to be safer than traditional heaters, they can still pose a risk if they are not used properly.

One of the main concerns with portable heaters is the risk of fire. It is essential to keep flammable materials away from the heater, including curtains, furniture, and bedding. It is also important to ensure that the heater is not placed too close to walls or other objects that could catch fire.

Another safety concern is the risk of carbon monoxide poisoning. This is a risk with any type of fuel-burning heater, including some types of energy-efficient portable heaters. To prevent carbon monoxide poisoning, it is essential to ensure that the heater is properly vented and to never use it in an enclosed space.

Overall, energy-efficient portable heaters can be a safe and effective way to supplement your home heating system. However, it is important to follow the manufacturer's instructions carefully and to take the necessary precautions to prevent accidents and injuries.

Can energy-efficient portable heaters be used to heat large rooms or spaces?

Energy-efficient portable heaters can be used to heat large rooms or spaces, but the effectiveness of the heater will depend on several factors such as the size of the room, the insulation of the room, and the power of the heater. It is recommended to use a heater with a power output of at least 10 watts per square foot of the room being heated.

However, it is important to note that using a portable heater as the primary source of heating for a large room or space may not be the most cost-effective option in the long run. It is best to consider other options such as upgrading the insulation or heating system of the room or space, which may provide better energy efficiency and cost savings in the long term.

In summary, energy-efficient portable heaters can be used to heat large rooms or spaces, but it is important to consider the power output of the heater and other long-term options for energy efficiency and cost savings.

Do energy-efficient portable heaters come with programmable settings and remote controls?

Yes, many energy-efficient portable heaters come with programmable settings and remote controls. These features allow users to set the temperature and heating schedule based on their preferences and daily routine, making them a convenient and efficient heating solution. With programmable settings, users can set the heater to turn on and off at specific times, ensuring that the room is warm and comfortable when they need it. Remote controls make it easy to adjust the temperature and settings from a distance, without having to get up and manually adjust the heater. These features not only make energy-efficient portable heaters more user-friendly but also help to reduce energy consumption by ensuring that the heater is only used when needed. It is important to check the features of the specific portable heater you are considering to ensure it has the programmable settings and remote control you desire.

How do energy-efficient portable heaters compare to traditional heaters in terms of energy usage?

Energy-efficient portable heaters are designed to consume less energy compared to traditional heaters. Traditional heaters are often bulky, and they use a lot of energy to heat the entire room. On the other hand, energy-efficient portable heaters are compact and can heat up a smaller area. This means that they consume less energy compared to traditional heaters.

Energy-efficient portable heaters are often equipped with advanced features such as programmable thermostats and timers. These features allow users to set the desired temperature and time of operation, which helps to reduce energy consumption. Traditional heaters, on the other hand, do not have these advanced features, and they can consume more energy.

Another advantage of energy-efficient portable heaters is that they are often made of materials that are good at retaining heat, such as ceramic or oil-filled radiators. This means that they can continue to provide warmth even after they have been turned off, which further reduces energy consumption.

Overall, energy-efficient portable heaters are a good choice for those who want to reduce their energy consumption and save money on their energy bills. However, it is important to note that the effectiveness of the heater will depend on factors such as the size of the room and the level of insulation in the home.

How long do energy-efficient portable heaters typically last?

The lifespan of an energy-efficient portable heater can vary depending on several factors including the quality of the unit, frequency of use, and maintenance. On average, a well-maintained portable heater can last for 5-10 years. However, some units may last longer or shorter than this range.

To extend the lifespan of your portable heater, it is important to clean it regularly, replace the filters as recommended by the manufacturer, and store it properly when not in use. It is also important to purchase a high-quality unit from a reputable manufacturer and follow the manufacturer's instructions for use and maintenance.

If you are experiencing issues with your portable heater, it may be worth consulting a professional for repair or replacement options. In addition, it is important to note that while energy-efficient portable heaters can help reduce energy costs, they should always be used safely and with caution to prevent accidents and injuries.

How much can I expect to save on my energy bill by using an energy-efficient portable heater?

The amount you can save on your energy bill by using an energy-efficient portable heater will depend on several factors, such as the size of the room you're heating, the type of heater you're using, and the temperature you're setting it to. However, in general, energy-efficient portable heaters are designed to use less energy than traditional heaters, which means you should see a reduction in your energy bill.

On average, using an energy-efficient portable heater can save you between 10% and 30% on your energy bill, depending on the factors mentioned above. For example, if you're using a high-performance infrared heater to heat a small room, you could save up to 30% on your energy bill compared to using a traditional electric heater.

To maximize your savings, make sure you choose an energy-efficient portable heater that is the right size for your room and has a high energy-efficiency rating. You should also consider using a programmable thermostat to control the temperature and only heat the room when you're using it.

What are the key features to look for in an energy-efficient portable heater?

When looking for an energy-efficient portable heater, there are several key features to consider. Firstly, the heater should have an adjustable thermostat, which allows you to set the desired temperature and prevent overheating. Secondly, the heater should have a timer function that allows you to set the heater to turn off after a certain period. Thirdly, the heater should have a fan-only mode, which can be useful during the summer months. Fourthly, the heater should have safety features such as overheat protection and tip-over switch. Fifthly, the heater should have a high energy efficiency rating, such as an Energy Star certification. Lastly, the heater should be easy to move around and store, with a lightweight and compact design. By considering these key features, you can ensure that you choose an energy-efficient portable heater that meets your needs and is cost-effective to use.

What are the top-rated energy-efficient portable heaters on the market?

There are several energy-efficient portable heaters on the market with excellent ratings. One of the top-rated options is the DeLonghi HMP1500 Mica Panel Heater. It features a sleek design and uses micathermic technology to provide fast and efficient heating. Another popular choice is the Lasko 5409 Ceramic Portable Space Heater, which has a compact design and utilizes ceramic heating elements to provide warmth. The Dr. Infrared Heater Portable Space Heater is also highly rated for its energy efficiency, featuring a dual heating system that combines infrared and convection heating. For those looking for a more eco-friendly option, the Dyson AM09 Fan Heater is a great choice. It uses Air Multiplier technology to provide powerful heat while consuming less energy. Ultimately, the best energy-efficient portable heater for you will depend on your specific needs and preferences.

What is the average cost of an energy-efficient portable heater?

The average cost of an energy-efficient portable heater can vary depending on the brand, size, and features. However, on average, a high-quality energy-efficient portable heater can cost anywhere from $50 to $150. Keep in mind that while the initial cost may seem high, an energy-efficient heater can save you money in the long run by reducing your energy bills. When shopping for an energy-efficient portable heater, it's important to look for features such as adjustable thermostats, automatic shut-off, and tip-over protection to ensure safety and efficiency. Additionally, make sure to choose a heater that is appropriately sized for the room you will be using it in to maximize its effectiveness.

What types of energy sources do energy-efficient portable heaters use?

Energy-efficient portable heaters use various energy sources to provide warmth in an efficient way. The most common types of energy sources used by energy-efficient portable heaters are electricity, natural gas, propane, and kerosene.

Electric heaters are the most popular type of portable heaters and they utilize electricity as their main energy source. They are energy-efficient and cost-effective, especially when compared to other types of heaters. However, they can be expensive to operate for extended periods.

Natural gas heaters are also an effective option and they use natural gas as their energy source. They are generally more efficient than electric heaters and can be cheaper to operate, particularly if you have access to natural gas.

Propane heaters are another option, which are similar to natural gas heaters but they use propane gas instead of natural gas. Propane is a convenient and cost-effective fuel source, but it can be more expensive than natural gas.

Finally, kerosene heaters are also an option, but they are less commonly used due to their high operating costs and safety concerns.

Overall, the energy source used by an energy-efficient portable heater depends on the specific model and the needs of the user.

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