Comparison: Best Space Heater Diesel (Updated | Dec 16th)
When winter’s chill sets in, a reliable diesel space heater can be your best ally against the cold, offering powerful warmth even in the most frigid conditions. Whether you’re heating a large workshop, a construction site, or a spacious garage, these robust heaters deliver exceptional performance where electric models might fall short. In this guide, we’ll explore the top diesel space heaters on the market, comparing their heating capacity, fuel efficiency, and durability to help you find the perfect heating solution that’ll keep you comfortable through the harshest winter days.
Editor’s Choice
Best for a specific purpose
- Best for powerful industrial heating: BILT HARD 85
- Best for maximum heat coverage: BILT HARD 215
- Best for balanced power output: BILT HARD 135
- Best for versatile all-in-one: LF Bros 110V/12/24V 5KW Diesel Heater
- Best for efficient fast heating: VEVOR 8KW Diesel Heater All in One
- Best for extended runtime heater: RDXTIK 8L Diesel Heater
- Best for large capacity heating: 9L Large Diesel Heater
- Best for smart app control: VEVOR 8KW Diesel Heater All in One
- Best for rugged multi-fuel heater: Garvee 70000 BTUs Kerosene/Diesel Forced Air Heater
- Best for high altitude ready: LF Bros 110V/12V 5KW All-in-1 Diesel Heater
Product Comparison: Best Space Heater Diesel
Powerful Industrial Heating
BILT HARD 85,000 BTU Forced Air Kerosene Diesel Heater, Portable Torpedo Space Heater with Thermostat Control for Outside, Jobsite, Garage, and Construction Sites, CSA Certified
BILT HARD
- 【High Output Heat】: 33.38″ × 13.85″ × 15.8″(L x W x H). This multi-fuel forced air heater provides 85,000 BTUs, heating 2,200 sq. ft. for up to 9 hours; Fuel capacity: 5 gallons. And it only takes 0.6 gallons fuel to operate. Ideal for outdoor/indoor construction, as well as industrial & commercial applications. It Includes self-diagnostics, a thermostat, an indicator lamp, and cord wrap.
- 【Multiple Fuel Options】: Kerosene forced air heaters are CSA certified for multi-fuel use with these fuel types: kerosene, filtered diesel #1 and #2, fuel oil #1 and #2, or even jet A fuel (JP8). However, K1 Kerosene is the manufacturer’s recommended fuel for optimal, cleaner burns and long-lasting product life.
- 【Sturdy Steel Construction】: Rugged construction allows kerosene shop heaters to be used in winter. Typical uses include construction sites, patios, factories, sporting events, utility and outbuildings, and farming functions, (barns, etc).
- 【Requires Little to No Assembly】: This torpedo heater diesel is easy to assemble and has convenient maintenance. multi-fuel forced air heaters provide immediate relief from cold weather working conditions. Which is easy to convenient maintenance.
- 【Warranty】: BILT HARD forced air kerosene heater is guaranteed for 1 year. We aim for quality followed up with quality customer service directly provided by the manufacturer. We offer a free exchange for any quality problems within the warranty.
Maximum Heat Coverage
BILT HARD 215,000 BTU Forced Air Kerosene Diesel Heater with Wheels, Portable Torpedo Space Heater with Thermostat Control for Outside, Jobsite, Garage, and Construction Sites, CSA Certified
BILT HARD
- 【High Output Heat】 This multi-fuel forced air heater provides 215,000 BTU, whose fuel capacity is up to 13.2 gallons, which can heat 10750 sq. ft. The fan-forced design distributes heat across a wide area to keep your space warm and comfortable. Adjustable heat angle makes this heater a versatile choice.
- 【Multiple Optional Fuels】 Our kerosene forced air heaters are CSA certified for multi-fuel using, which admit following types of fuel: 2-K kerosene, filtered diesel #1 and #2. However, 1-K Kerosene is the manufacturer’s recommended fuel for optimal, which makes burn cleaner and better extends the service life of your heater.
- 【Sturdy Structure & Portable Design】 Made of durable steel and costed with anti-rusted powder, the kerosene shop heater is able to be used in cold winter. Besides, the design of movable wheels and pull handle allows to take your heater to any applicable place, and the support frame helps prevent from sliding and stay steady.
- 【Simple Installation Required】This torpedo space heater takes only few minutes to assemble, fast installation provides immediate relief from cold weather, and it’s also convenient to maintain. Additionally, overheat protection, thermostat, digital display, drain plug and cord wrap are included.
- 【Warranty】: BILT HARD forced air kerosene heater is guaranteed for 1 year. We aim for quality followed up with quality customer service directly provided by the manufacturer. We offer a free exchange for any quality problems within the warranty.
Balanced Power Output
BILT HARD 135,000 BTU Forced Air Kerosene Diesel Heater with Wheels, Portable Torpedo Space Heater with Thermostat Control for Outside, Jobsite, Garage, and Construction Sites, CSA Certified
BILT HARD
- 【High Output Heat】 This multi-fuel forced air heater provides 135,000 BTU, whose fuel capacity is up to 8 gallons, which can heat 3,200 sq. ft. for at least 8 hours. The fan-forced design distributes heat across a wide area to keep your space warm and comfortable. Adjustable heat angle makes this heater a versatile choice
- 【Multiple Optional Fuels】 Our kerosene forced air heaters are CSA certified for multi-fuel using, which admit following types of fuel: 2-K kerosene, filtered diesel #1 and #2. However, 1-K Kerosene is the manufacturer’s recommended fuel for optimal, which makes burn cleaner and better extends the service life of your heater
- 【Sturdy Structure & Portable Design】 Made of durable steel and costed with anti-rusted powder, the kerosene shop heater is able to be used in cold winter. Besides, the design of movable wheels and pull handle allows to take your heater to any applicable place, and the support frame helps prevent from sliding and stay steady
- 【Simple Installation Required】This kerosene torpedo heater takes only few minutes to assemble, fast installation provides immediate relief from cold weather, and it’s also convenient to maintain. Additionally, overheat protection, thermostat, digital display, drain plug and cord wrap are included
- 【Warranty】: BILT HARD forced air kerosene heater is guaranteed for 1 year. We aim for quality followed up with quality customer service directly provided by the manufacturer. We offer free exchange for any quality problems within the warranty
Versatile All-in-One
LF Bros 110V/12/24V 5KW Diesel Heater, All-in-One 5L Air Diesel Parking Space Heater with Stylish Design, Come with Remote Control and LCD Screen, Suitable for Home Shop Garage Camper
LF Bros
- Exclusive Diesel Heater: This LF Bros all in one 5kw diesel heater will provide constant heating while operating. Providing 4700~17000BTU, and fuel consumption of 0.18~ 0.53L/H. The working temperature is -40℉-104℉. No more piling on layers and curling up in corner, stay warm with LF Bros in this winter
- Real Use Anywhere: Apart from supporting 12v and 24v, the kit includes a 110v transfomer. You can plug the heater directly to 110 volts sockets. No fuss to buy extra parts and do the DIY work to use it in your garage or basement. Make you feel toasty in RV,car, camper,trailer, home, shop, basement etc in winter. Get prepared when the weather takes a turn
- Easy to use: This all in one diesel heater is very simple to set up to get ready to use. It comes with very detailed instruction booklet, you can also scan the QR code for installation tutorial. The LCD switch will display the working status. Remote controller has already been paired before delievery, and the remote control range is 100ft
- Exclusive Oil Leaking Proof: Different from others, the fuel tank cover LF Bros diesel heater adopted is built with internal thread, which works the same way a car’s gas cap works, effectively preventing oil spilling over while your vehicle is bumping on rough road, very safe to use
- Delicate Packaging: The kit is packed in a delicate box. The main machine is protected with plastic foam to prevent scratches and collisions. All the other parts are housed in a seperate box. User manual comes along inside. You can also store your diesel heater in the box for next winter. Get one for yourself and your loved ones before temperature begins to drop
Efficient Fast Heating
VEVOR 8KW Diesel Heater All in One, DC12-24V, Fast Heating Diesel Air Heater with Remote Control and Color Digital Display, Low Noise, Voice Announcement, for RV, Truck, Camper, Van, Boat and Trailer
VEVOR
- Efficient Heating: This diesel heater 8kw operates on DC 12V-24V, suitable for areas ranging from 161-215 FT². The ceramic igniter ensures quick starts in cold weather, raising the temperature in your vehicle, RV, boat, and more
- Upgraded Security Features: Enhanced security with a heat-insulated exhaust pipe shield to avoid burns or scorching. The leak-proof fuel cap minimizes risks on rough roads, and the fuel gauge ensures timely refueling, reducing the risk of dry burning
- Low Fuel Consumption: With a precision low-noise fuel pump, the diesel air heater only consumes 1 gallon per night (0.18-0.36L/h). The 5L (1.3gal) large-capacity tank and ≥90% combustion efficiency maximize fuel use, reducing waste
- Dual Control Options: The portable diesel heater includes a 98ft remote control for preheating from outside the vehicle, keeping the interior warm and avoiding frost. The LCD screen allows for temperature adjustment between 32-104℉ to suit your needs
- Wide Applicability: The diesel parking heater works effectively at altitudes under 9843ft. Compact and easy to install, it provides continuous warmth in high-altitude or cold environments, ensuring comfort no matter where you are
Extended Runtime Heater
RDXTIK 8L Diesel Heater, 8KW 12V/24V/110V/240V All in One Diesel Heater with LCD Switch, Remote Control, Muffler for Truck, RV, Home, Car, Campers, Boat, White
RDXTIK
- All-In-One Unit: Our diesel heater offers efficient heating without the need for installation, making it ideal for outdoor adventures such as camping. This 8000w diesel heater provides continuous heating during operation, with fuel consumption ranging from 0.18 to 0.53 liters per hour. The temperature adjustment range is 46.4°F-96.8°F/8°C-36°C, allowing you to meet your specific needs.
- Multiple Voltage Options: RDXTIK diesel heater not only supports 12V and 24V voltages but also includes a 110-240V transformer, allowing you to use it quickly at home or while driving. Additionally, it features thermostatic control, timing function, preheating, and overheat protection of ≥518°F/270°C, ensuring a safe and comfortable experience throughout the night.
- Extra Long Time Use: Our portable diesel heater utilizes an advanced low-noise fuel pump, consuming only about 1 gallon of fuel per night and reducing fuel consumption to 0.16-0.62 liters per hour, thereby saving on fuel costs. Equipped with an 8L large-capacity fuel tank, this diesel air heater provides up to 24 hours of continuous heating, maximizing fuel efficiency and minimizing energy waste.
- 3-IN-1 Installation: To meet your usage needs in different environments, we have equipped the machine with two additional bases, one with a rubber bottom and the other with a metal bottom. You can choose to use them or not according to different situations.
- Anti-Oil Leakage Design: To ensure safe use and a longer service life, this 2025 upgraded diesel heater feature an internal thread design and additional rubber ring on it. Whether during travel or refueling, it can perfectly prevent and solve various problems.
Large Capacity Heating
9L Large Diesel Heater, 8KW 240V/110V/12V/24V All in One Diesel Air Heater with LCD Switch, Remote Control, Suitable for Truck, RV, Home, Car, Campers, Boat, White
BSMTEK
- 8KW Exclusive Diesel Heater- This BSMTEK all in one 8kw diesel heater will provide constant heating while operating. Heater Power: 8 KW; Rated Voltage: 12 V. Applicable Range: 215-269ft²/20-25m², and fuel consumption of 0.16~ 0.62L/H. The working temperature is -45℉-109℉. Within just 10 minutes,No more piling on layers and curling up in corner, stay warm with BSMTEK in this winter.
- 9L Diesel Heater Real Use Anywhere- BSMTEK diesel heater not only supports 12V and 24V voltages but also includes a 100-125V adapter.You can plug the heater directly to 110 volts sockets. No fuss to buy extra parts and do the DIY work to use it in your garage or basement. Make you feel toasty in RV,car, camper,trailer, home, shop, basement etc in winter.
- With LCD Easy to use- This all in one diesel heater is very simple to set up to get ready to use. It comes with very detailed instruction booklet.The LCD switch will display the working status. Remote controller has already been paired before delievery, and the remote control range is 100ft.
- Extra Long Time Use-Our portable diesel heater utilizes an advanced low-noise fuel pump, consuming only about 1 gallon of fuel per night and reducing fuel consumption to 0.16-0.62 L/H, thereby saving on fuel costs. Equipped with an 9L/2.38GAL large-capacity fuel tank, this diesel air heater provides up to 24 hours of continuous heating, maximizing fuel efficiency and minimizing energy waste.
- Extra Long Time Use- Our portable diesel heater with a silencer, consuming only about 1 gallon of fuel per night and reducing fuel consumption to 0.16-0.62L/H, thereby saving on fuel costs. Equipped with an 9L/2.38GAL large-capacity fuel tank, this diesel air heater provides up to 24 hours of continuous heating, maximizing fuel efficiency and minimizing energy waste.
- Upgraded Anti-Oil Leakage Design: The kit is packed in a delicate box. The main machine is protected with plastic foam to prevent scratches and collisions. All the other parts are housed in a seperate box. User manual comes along inside. You can also store your diesel heater in the box for next winter.To ensure safe use and a longer service life, this 2025 upgraded diesel heater feature an internal thread design and additional rubber ring on it. Whether during travel or refueling, it can perfectly prevent and solve various problems.
Smart App Control
VEVOR 8KW Diesel Heater All in One, Diesel Air Heater with Bluetooth App Control, Portable Parking Heater Automatic Altitude Adjustment Max 18045 ft, Remote Control and LCD, for Vehicles
VEVOR
- Easy Installation-free Solution: Enjoy efficient heating with our diesel heater all in one that requires no installation, making it perfect for outdoor adventures like camping. Heater Power: 8 KW; Rated Voltage: 12 V. Applicable Range: 215-269ft²/20-25m². Within just 10 minutes, our innovative sandblasting aluminum heat exchanger ensures rapid and efficient heat transfer, ensuring a comfortable temperature inside your vehicle or boat.
- Phone=Controller: Our latest upgraded diesel heater features enhanced Bluetooth control for even greater convenience. Simply download the app and gain control to preheat your heater from a distance of up to 98 ft/30 m. And it also comes with a 32 ft/10 m remote control and LCD; choose your convenient control method. The temperature can be adjusted from 46.4 °F-96.8 °F/8 °C-36 °C, catering to your specific needs.
- Automatic Altitude Compensation: VEVOR diesel air heater is equipped with automatic altitude compensation, making it suitable for altitudes up to 18,045 feet/5,500 meters. It adjusts its operation based on the altitude, so you don’t have to manually control it. Enjoy seamless heating performance even in high-altitude environments.
- Low Energy Consumption & High Output: Save on fuel costs with our protable diesel heater’s precision low-noise fuel pump, consuming around 1 gallon per night and reducing fuel consumption to a range of 0.16-0.62 L/h. With a 5 L/1.3 gal large capacity fuel tank, the diesel air heater can provide continuous heat for up to 8 hours, maximizing fuel efficiency and minimizing energy waste.
- Secure and Reliable: Our 12V diesel heater features a high safety system, allowing for worry-free usage in various environments such as cars, RVs, and ships. It provides constant temperature control, timing function, voice broadcasting, preheating, and overheating protection at ≥518 °F/270 °C, ensuring a secure and comfortable experience throughout the night.
Rugged Multi-Fuel Heater
Garvee 70000 BTUs Kerosene/Diesel Forced Air Heater, Kerosene Fan Forced Heater with Thermostat Control for Warehouses, Construction, Workshops, 120V/60Hz
Garvee
- High Heat Output: This 70000 BTU kerosene forced air heater delivers powerful warmth for areas up to 1722.2 sq. ft. using a high-output fan
- Multi-Fuel Compatibility: Runs on K-1 kerosene, Diesel #1, Diesel #2, Fuel Oil #1, and Fuel Oil #2. (K-1 kerosene recommended for optimal performance)
- Extended Runtime: The 5-gallon (19L) fuel tank provides up to 8 hours of continuous heating. Ideal for well-ventilated construction sites, barns, warehouses, and workshops
- Rugged Steel Construction: Built with stainless steel + cold-rolled plate for extreme durability. Operates reliably in winter conditions (-25°C to 65°C / -13°F to 149°F)
- Safety Systems: The product integrates Overheat auto-shutdown, Flameout protection, Reinforced safety guard, Built-in thermostat & pressure gauge.(Ensures secure operation in demanding environments)
High Altitude Ready
LF Bros 110V/12V 5KW All-in-1 Diesel Heater, 5L Air Diesel Parking Space Heater with Plateau Mode, Come with Remote, T4 LCD Controller and Timer, Suitable for Home Shop Garage Camper
LF Bros
- Designed for plateau: Tested at an altitude of 17000 feet, the N2-T model support allows you to use it at all kinds of terrains. We have adopted aviation grade plug and antifreeze power cord to make sure the heater operating normally under extreme cold weather. Ideal for alpine camping, ice fishing, winter hunting, etc.
- Real Use Anywhere: Apart from supporting 12v, the kit includes a 110v transfomer. You can plug the heater directly to 110 volts sockets. No fuss to buy extra parts and do the DIY work to use it in your garage or basement. Make you feel toasty in RV,car, camper,trailer, home, shop, basement etc in winter. Get prepared when the weather takes a turn
- Easy to use: This all in one diesel heater is very simple to set up to get ready to use. It comes with very detailed instruction booklet, you can also scan the QR code for installation tutorial and maintainance information. The LCD switch will display the working status. Remote controller has already been paired before delievery, and the remote control range is 100ft
- Exclusive Oil Leaking Proof: Different from others, the fuel tank cover LF Bros diesel heater adopted is built with internal thread, which works the same way a car’s gas cap works, effectively preventing oil spilling over while your vehicle is bumping on rough road, very safe to use
- Delicate Packaging: The kit is packed in a delicate box. The main machine is protected with plastic foam to prevent scratches and collisions. All the other parts are housed in a seperate box. User manual comes along inside. You can also store your diesel heater in the box for next winter. Get one for yourself and your loved ones for your winter adventure.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.
Buying Guide
FAQs
What’s the difference between forced air and all-in-one diesel heaters?
Forced air heaters are powerful units designed to quickly heat large, well-ventilated spaces like workshops or construction sites. All-in-one heaters are more compact, portable units often used for enclosed spaces like RVs, cabins, or garages, offering more precise temperature control.
How do I choose the right BTU output for my space?
Calculate the volume of your space and consider its insulation level; larger, poorly insulated areas require higher BTU ratings. As a general rule, a heater with around 40-50 BTUs per cubic foot is a good starting point for well-insulated spaces.
Are diesel heaters safe to use indoors?
Diesel heaters can be used indoors only in well-ventilated areas or if they are specifically designed for indoor use with proper exhaust venting. All-in-one units for RVs and cabins have sealed combustion and exhaust systems, while forced air models should never be used in enclosed living spaces.
What fuel types can these heaters use?
Many diesel heaters are multi-fuel compatible, able to run on kerosene, diesel #1 and #2, and sometimes jet fuel. However, using the manufacturer’s recommended fuel, typically K-1 kerosene, ensures cleaner combustion and extends the heater’s lifespan.
What features are important for convenience and safety?
Key safety features include overheat protection, tip-over switches, and flameout sensors. For convenience, look for thermostats, remote controls, digital displays, and easy-to-maintain designs with accessible drain plugs.
How much fuel will a diesel heater consume?
Fuel consumption varies by BTU output and usage, typically ranging from 0.16 to over 1 gallon per hour. Larger, more powerful forced air heaters consume fuel faster than smaller, all-in-one units designed for sustained, lower-output heating.
Is portability a major factor to consider?
Yes, portability is crucial depending on your application. Forced air heaters often come with wheels and handles for moving between job sites, while all-in-one units prioritize compact size and multiple voltage options for versatility in vehicles and small spaces.
What is the benefit of a heater with multiple voltage options?
Heaters supporting 12V, 24V, and 110V/240V offer incredible versatility, allowing you to use them in a vehicle, RV, or directly from a wall outlet at home. This eliminates the need for separate heaters for different applications, providing great value and convenience.