Industrial kerosene heaters provide portable, high-output heat for shops, garages, construction sites, and large spaces where electric heat is impractical. This guide compares five widely used models, summarizing their core specs and intended uses to help you match capacity, fuel flexibility, and safety features to your space.
| Model | Output | Coverage / Run Time |
|---|---|---|
| Dyna-Glo KFA50DGD | 50,000 BTU | Up To 1,200 Sq. Ft. |
| Mr. Heater 80,000 BTU Forced Air | 80,000 BTU | Up To 2,000 Sq. Ft.; Multi-Fuel |
| LB White Tradesman K125 | 125,000 BTUH | Industrial/Construction Use; Multi-Fuel |
| SunFire SF150 Radiant | 150,000 BTU | Up To 3,500 Sq. Ft.; 19-Hour Run |
| SunFire SF120 Radiant | 120,000 BTU | Up To 2,800 Sq. Ft.; 16-Hour Run |
SunFire SF150 Radiant Industrial Heater
The SunFire SF150 is a high-output radiant heater designed for large indoor and outdoor work areas. The manufacturer highlights a near-odorless combustion that burns up to 99% of fuel, reducing fumes in the workspace.
Key Features Referenced: 150,000 BTU output, heats up to 3,500 sq ft, large 19-gallon tank with ~19 hours run time at specified flow rate, and capability to run on diesel, kerosene, and #2 fuel oil. The radiant design makes it less affected by wind and quieter than forced-air torpedo heaters.
Industrial Use Perspective: Radiant heat is directional and efficient for stationary work zones and high-bay shops. The SF150 suits large workshops or jobsite tents where continuous, quiet, and low-odor heat is prioritized.
SunFire SF120 Radiant Industrial Heater
The SunFire SF120 is a slightly lower-capacity radiant option for medium-to-large spaces that still require quiet, low-odor heat. It is designed for indoor use in shops, garages, and warehouses where forced-air blowers are less desirable.
Key Features Referenced: 120,000 BTU output, heats up to 2,800 sq ft, 14-gallon tank delivering around 16 hours runtime, and compatibility with diesel, kerosene, and #2 fuel oil. The unit emphasizes reduced fumes and quieter operation than torpedo heaters.
Industrial Use Perspective: Choose radiant models like the SF120 when you need steady directional heat, minimal airflow disturbance, and extended run times for multi-shift operations or large open areas.
L.B. White Tradesman K125 Torpedo Heater
The L.B. White K125 is a portable forced-air torpedo heater built for rugged conditions on construction sites and heavy-duty shops. It prioritizes durability and reliable ignition systems suited to frequent use.
Key Features Referenced: 125,000 BTUH, multi-fuel support including kerosene, No. 1 diesel, and No. 1 fuel oil, dual-prong electronic spark ignition, heavy-duty enclosed motor, and brass fuel fittings for longevity.
Industrial Use Perspective: Forced-air units deliver rapid zone temperature increases and are effective for drying, spot heating, and temporary site warming. The K125’s rugged build targets contractors who need dependable startups and serviceability.
Mr. Heater 80,000 BTU Multi-Fuel Forced Air
The Mr. Heater 80,000 BTU model is a versatile forced-air unit rated for higher output with multi-fuel capability. It is positioned to heat larger zones while offering diagnostic and control features for smoother operation.
Key Features Referenced: 80,000 BTU output, heats approximately 2,000 sq ft, compatible with kerosene, diesel, fuel oil, and jet A, and includes a built-in thermostat plus LED troubleshooting diagnostics.
Industrial Use Perspective: The unit is suited for mixed-fuel availability environments and users who want basic automation via a thermostat and on-board diagnostics for maintenance troubleshooting.
Dyna-Glo KFA50DGD 50,000 BTU Forced Air
The Dyna-Glo KFA50DGD is a compact forced-air kerosene heater that balances portability with useful heat output for moderate industrial spaces, garages, and jobsite trailers.
Key Features Referenced: 50,000 BTU capacity, heats up to 1,200 sq ft, and includes an easy lift carrying handle for mobility. The model emphasizes straightforward setup and transport between work areas.
Industrial Use Perspective: This model fits smaller shops and work zones where mobility and sufficient heat rather than maximum capacity are required. Forced-air design provides quick warm-up and directional airflow control.
Buying Guide: Choosing The Right Industrial Kerosene Heater
Selecting an industrial kerosene heater requires balancing heat output, fuel flexibility, safety features, and operating environment. Below are the main considerations and comparison perspectives.
1. Heat Output And Coverage
Match the heater’s BTU rating to the volume of the space, accounting for insulation and ceiling height. Radiant heaters provide effective heat for targeted zones, while forced-air torpedo heaters move warm air to distribute heat faster across open areas.
2. Fuel Compatibility And Fuel Economy
Multi-fuel units accept kerosene, diesel, and fuel oil, offering fuel-source flexibility during supply constraints. Compare stated gallons-per-hour (GPH) or run time figures to estimate refueling frequency and operating cost. Larger tanks increase runtime but add weight.
3. Radiant Versus Forced-Air
Radiant heaters (SunFire models) deliver directional heat, quieter operation, and minimal cold-air induction, making them ideal for stationary workstations and high-bay interiors. Forced-air heaters (torpedo style) heat spaces quickly and are better when you need rapid warm-up or airflow for drying tasks.
4. Safety Features And Indoor Use
For indoor operation, prioritize units with low-odor combustion, automatic shutoff, tip-over protection, and proper venting considerations. Radiant models designed to burn fuel more completely can reduce fumes. Always follow local codes regarding ventilation and fuel storage.
5. Durability And Serviceability
For construction and continuous use, look for heavy-duty components such as brass fuel fittings, enclosed motors, and reliable ignition systems. Easy access to filters, fuel lines, and serviceable parts reduces downtime.
6. Portability And Installation
Consider unit weight, handles, and wheel kits for models that need frequent relocation. Fixed or semi-fixed installations may allow larger tanks and mounts; portable units prioritize mobility and quicker setup.
7. Noise And Workplace Comfort
Forced-air torpedoes tend to be louder; radiant heaters are quieter and may be preferable in occupied indoor shops. Evaluate acoustic impact for multi-shift workspaces and client-facing environments.
8. Controls And Diagnostics
Built-in thermostats and diagnostics simplify operation and troubleshooting. LED diagnostics can speed maintenance decisions on job sites. For remote or automated spaces, thermostat compatibility matters.
9. Regulatory And Ventilation Considerations
Confirm local building codes and OSHA guidance for fuel-fired heaters used indoors. Provide adequate ventilation to manage combustion byproducts and comply with safety rules for fuel storage and exhaust management.
10. Comparison Perspectives
- Large Workshop/Continuous Use: Favor high-BTU radiant models with large tanks for long runtimes and low odor (SunFire SF150).
- Construction Site/High Heat Demand: Choose robust forced-air torpedoes with multi-fuel capability and durable fittings (L.B. White K125).
- Medium Shop/Portability: Mid-range forced-air units that balance transportability and output (Mr. Heater 80K or Dyna-Glo 50K).
- Quiet Indoor Operations: Prefer radiant heaters for quieter service and directional warmth (SunFire SF120).
Use these factors together—space size, desired runtime, fuel availability, ventilation limits, and noise tolerance—to select the most suitable industrial kerosene heater for your application.