Finding a torpedo heater with near-200,000 BTU output requires weighing fuel type, run time, airflow, and safety features. Below is a quick comparison of five heavy-duty torpedo heaters that fit large job sites, workshops, and outdoor heating needs.
| Product | BTU Output | Fuel Type |
|---|---|---|
| Dura Heat LPC200 | 200,000 BTU | Liquid Propane (LP) |
| Mr. Heater MH170QFAVT | 125,000–170,000 BTU | Propane |
| ProTemp PT-140T-KFA | 140,000 BTU | Kerosene / Diesel |
| Towallmark 125,000 | Up To 125,000 BTU | Kerosene / Diesel / Heating Oil |
| Mr. Heater 125,000 F271390 | 125,000 BTU | Propane |
Dura Heat LPC200 200K LP Portable Convection Heater
The Dura Heat LPC200 is the highest-output model in this selection with a 200,000 BTU rating designed for large outdoor areas and well-ventilated commercial spaces.
Key features include a collapsible two-piece design for transport, a long runtime capability when paired with large LP cylinders, and a built-in wind shield to protect the burner flame in breezy outdoor conditions. The unit is intended for LP (propane) cylinders, offering steady high-output heat suited for large job sites and outdoor events.
Considerations: This convection-style heater is ideal where airflow circulation is present but is not designed for enclosed, unventilated spaces. It emphasizes portability and high output rather than quiet operation or indoor emissions controls.
Mr. Heater MH170QFAVT 170K Propane Forced Air Heater
The Mr. Heater MH170QFAVT supplies 125,000–170,000 BTU with forced-air delivery, designed to heat up to thousands of square feet quickly. It targets large job sites, garages, and outdoor events.
Notable features are Quiet Burner Technology for reduced noise, a rugged build with a heavy-duty handle, and thermoelectric safety valves plus a high-temperature limit switch for added protection. It’s optimized for portability and efficient forced-air heating distribution.
Considerations: Forced-air units produce directed warm airflow and require adequate ventilation in semi-enclosed spaces. This model strikes a balance between high output and reduced operational noise compared with standard torpedo heaters.
ProTemp PT-140T-KFA 140K Kerosene/Diesel Forced Air
The ProTemp PT-140T-KFA is a 140,000 BTU forced-air torpedo heater built for diesel and kerosene fuels and designed for continuous heavy-duty use in warehouses and construction sites.
Key specifications include direct-drive motors and matched blades for high airflow up to 12,000 CFM, powder-coated steel guards for corrosion resistance, and energy-efficient motor operation that draws low amps. The design emphasizes robust airflow and durability for hard-use environments.
Considerations: Fuel flexibility and high airflow make this unit effective for moving warm air across large volumes, but proper ventilation and fuel handling practices are required with liquid fuels like kerosene and diesel.
Towallmark 125K Multi-Fuel Forced Air Heater
The Towallmark 125,000 is a multi-fuel forced-air torpedo heater providing up to 125,000 BTU. It can run on kerosene, diesel, home heating oil, and certain jet fuels (gasoline is explicitly not allowed).
Features include a 26L fuel tank offering multiple hours of runtime, thermostat control for maintaining target temperatures, and portability for jobsite or outdoor usage. The unit lists a coverage estimate for several thousand square feet depending on conditions.
Considerations: Multi-fuel capability increases operational flexibility, but fuel cleanliness, filtration, and proper tank maintenance are important to prolong service life. Thermostat control helps reduce fuel consumption compared to manual on/off operation.
Mr. Heater 125,000 BTU Forced Air Propane Heater
This Mr. Heater F271390 model offers 125,000 BTU with forced-air distribution and incorporates Quiet Burner Technology similar to other Mr. Heater units for reduced noise in working environments.
Included accessories often feature a regulator and a hose for convenient connection to external propane supply. It also includes a high-temperature limit switch and other standard safety provisions for forced-air propane heaters.
Considerations: The unit is a reliable mid-range high-output propane heater suitable for many indoor/outdoor job-site needs where propane infrastructure is available and ventilation protocols are observed.
Buying Guide: Choosing The Right High-BTU Torpedo Heater
Use the following considerations to match a torpedo heater to your space and operational needs.
1. BTU Output Versus Space
BTU rating estimates heating potential but effective coverage depends on insulation, ceiling height, and air changes per hour. For open outdoor areas, higher BTU and airflow are needed to maintain temperature. For semi-enclosed job sites, balance BTU with ventilation.
2. Fuel Type And Availability
- Propane (LP): Clean-burning, easy to connect to cylinders, common for portable torpedoes. Good for outdoor and semi-enclosed jobs.
- Kerosene/Diesel: Often offers longer run times per tank and lower fuel cost per heating hour, but requires careful fuel handling and may produce more odors and particulates.
- Multi-Fuel: Flexible for remote sites where fuel availability varies, but may need extra maintenance and filtration.
3. Forced-Air Versus Convection
Forced-air torpedoes move heated air quickly across large volumes—effective for directional warming and quick temperature rise. Convection units provide passive warmth and are suited for more even, less-directed heating. Forced-air models often require more ventilation.
4. Airflow (CFM) And Distribution
Look at CFM ratings or manufacturer airflow claims. Higher airflow distributes heat faster across broad areas. Fan design and motor power influence actual distribution efficiency.
5. Safety Features And Emissions
- Thermoelectric safety valves and high-temperature limit switches prevent overheating or unsafe operation.
- Tip-over protection and flame sensors are important for jobsite safety.
- Be aware of combustion byproducts—never operate in unventilated enclosed spaces. Follow local codes for indoor use and emissions control.
6. Portability And Installation
Consider weight, handles, collapsible components, and whether permanent mounting or quick relocation is needed. Some units require external tanks or hoses; check hose lengths and regulator compatibility.
7. Runtime And Fuel Capacity
Runtime is influenced by fuel tank size and heat setting. Propane cylinders and integrated tanks differ in convenience and continuous operation duration. For extended operation, consider larger external fuel sources or models designed for long run times.
8. Noise And Workplace Comfort
Some torpedo heaters use quiet burner or noise-reduction technologies. If the heater will be used near workers or public areas, prioritize models with reduced decibel output.
9. Durability And Maintenance
Look for corrosion-resistant coatings, robust guards, and ease of access for cleaning filters and fuel lines. Proper maintenance extends service life, especially for diesel/kerosene units subject to fuel contamination.
10. Regulatory Compliance And Site Requirements
Confirm local fire codes and indoor ventilation regulations before selecting a high-BTU heater. Some facilities restrict certain fuel types or require ventilation and monitoring equipment for indoor use.
Comparison Perspectives
- Maximum Output: Dura Heat LPC200 targets the highest BTU in this set for large outdoor or well-ventilated spaces.
- Balanced Output & Quiet Operation: Mr. Heater MH170QFAVT provides high output with quieter operation for jobsite comfort.
- Fuel Flexibility: Towallmark supports multiple liquid fuels for sites with variable fuel supplies.
- High Airflow: ProTemp emphasizes high CFM airflow for rapid distribution in large volumes.
- Mid-Range Reliability: Mr. Heater 125K models offer proven forced-air performance with standard safety features.
Evaluate the match between BTU, fuel type, airflow, and safety/ventilation requirements for your specific site before selecting a torpedo heater. Proper installation and adherence to manufacturer instructions ensure safe and effective operation.