Sunfire SF80 80,000 BTU Radiant Heater: Can It Handle Your Garage Workshop in 2026?
The SUNFIRE SF80 delivers 80,000 BTUs to heat up to 1,900 sq ft of garage or workshop space. It is a powerful, US-made industrial heater built for serious work environments.
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Key Specifications
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Our Verdict
The SUNFIRE SF80 puts out 80,000 BTUs of radiant heat. It covers up to 1,900 sq ft. That level of output is built for garages, warehouses, and large job sites.
A 6-gallon tank runs for about 10 hours straight. You can heat a large workspace all day without stopping to refuel. The heater burns diesel or kerosene to produce that heat.
Safety features include a tip-over switch and a built-in flame sensor. Both trigger automatic shutoffs when something goes wrong. These protections matter in busy, active work environments.
You get no thermostat, no timer, and no remote control. Operation is fully manual. You turn it on and it heats at full output until you turn it off.
At $1,795, this is a professional-grade investment. It is built and supported in the USA. You get a 2-year warranty and free lifetime technical phone support from Sunfire.
What We Like
- 80,000 BTU output heats up to 1,900 sq ft of garage or workshop space.
- Built-in tip-over switch shuts the heater off immediately if it gets knocked over.
- Flame sensor auto-shuts down the heater if it detects a poor or lost flame.
- A 6-gallon tank delivers up to 10 hours of continuous heat on a single fill.
- Made in the USA in Janesville, Wisconsin, with free lifetime phone support from US-based technicians.
What Could Be Better
- No thermostat to set and hold a target temperature automatically.
- No timer to schedule heating start or stop times.
- No remote control to adjust the heater from across the room.
- Requires diesel or kerosene fuel, adding ongoing fuel costs on top of the $1,795 purchase price.
- No oscillation or fan to distribute heat, so warming is directional and limited to the radiant beam.
Standout Features
Full Specifications
Additional Info
| Assembly | No |
Frequently Asked Questions
Common questions about SUNFIRE Radiant Heater - 80,000 BTUs Diesel/Kerosene Portable Industrial Heater with Quiet & Odorless Design - SF80
What kind of fuel does the SUNFIRE SF80 use?
The SF80 runs on diesel or number 2 fuel oil at 0.58 gallons per hour. You can also use kerosene at 0.56 gallons per hour.
How large of a space can the SF80 heat?
Sunfire rates the SF80 for spaces up to 1,900 square feet. That makes it a strong choice for large garages, pole barns, workshops, and warehouses.
How long does one tank of fuel last?
The 6-gallon tank lasts approximately 10 hours of continuous operation at full output. That covers a full workday on a single fill.
Does the SF80 have automatic safety shutoffs?
Yes. A tip-over switch shuts the heater off if it falls. A built-in flame sensor shuts it down and starts a cool-down cycle if the flame goes out or burns poorly.
Can I use the SF80 inside a building?
The SF80 is rated for indoor use, but it is designed for industrial spaces like garages, pole barns, and job sites. It is not built for residential living areas or enclosed rooms without proper ventilation.
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How this product scores for different use cases
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