FAQ

You can purchase from local SunFire Dealers & Retailers, from many online retailers, or even directly from SunFire. Find all of your purchase options Here.

SunFire heaters are manufactured in the USA. This is important because you have direct access to the manufacturer whenever you need assistance for the life of your heater. We do extensive research & development to constantly improve our products and every heater is fully tested before it leaves our facility.

No other company offers the same level of support that SunFire provides. Our employees take great pride in building the very best radiant heaters in the world where every customer is important. We guaranty your 100% total satisfaction and will be there when you need us.

SunFire Heaters will outperform torpedo-style heaters in multiple important categories. They are more quiet, virtually odorless, and have zero carbon monoxide emissions for indoor commercial applications. This improves the health and performance for you and your employees.

In addition, radiant heat is more efficient by heating people and objects directly rather than the less efficient heat transfer heating process used by forced air heaters. Our radiant heaters warm objects just like the sun and offer a breeze free and dustless heating experience.

SunFire radiant heaters produce zero carbon monoxide when kept properly maintained and tuned. They offer a safe indoor heating experience for a commercial shop, pole barn, or even a residential garage.

Note: Always use proper ventilation to replenish oxygen that is used up during the combustion process to burn the fuel. With a lack of oxygen, the flame may go out.

Each radiant heater is compatible with any standard manual or battery-operated wall
thermostat. Thermostats may be purchased through our parts page, hardware stores, or
major retailers. They can be any brand or style.

To install, simply connect the wire leads from the heater to the R and W terminals on the
thermostat. For detailed installation instructions, please refer to your product manual.

Note: Do not use a wall thermostat that requires a 120V power source (such as a Nest®
thermostat), as this may damage the internal primary control.

Yes. You can run on full kerosene or a mixture of both diesel and kerosene at any ratio. 

NOTE: SunFire heaters are tuned for optimum performance using diesel fuel out of the box from the factory due to it's availability and price advantage compared to kerosene. Kerosene also burns at a colder temperature than diesel fuel. Therefore, you may notice that your dome face will not glow as hot compared to using diesel and also may notice a slight trace of smell. This is due the lower temperature burn rate of kerosene and a slightly improper mixture of fuel and air. To solve this, we simply recommend increasing the fuel flow rate on the fuel pump by turning the brass flow screw on the pump clockwise up to one full turn. You may also need to adjust the air flow, generally increasing the flow by adjusting the white screw on the voltage regulator clockwise or adjusting the air damper depending on your model. Please view your operating manual for instructions on for more information on making these adjustments.

No! Not with SunFire heaters. The common view is that kerosene burns much cleaner than diesel. But the technology used in SunFire's radiant heaters makes diesel burn just as pure and clean as kerosene fuel. When you use diesel fuel, you will still get an odorless heating experience with no fumes that is safe to use inside a shop, pole barn, or residential garage.

In fact, our heaters are tested and tuned for diesel fuel out of the box and is our recommended fuel source when possible.

NOTE: Kerosene also burns at a colder temperature than diesel fuel. Therefore, you may notice that your dome face will not glow as hot compared to using diesel and also may notice a slight trace of smell. This is due the lower temperature burn rate of kerosene and a slightly improper mixture of fuel and air. To solve this, we simply recommend increasing the fuel flow rate on the fuel pump by turning the brass flow screw on the pump clockwise up to one full turn. You may also need to adjust the air flow, generally increasing the flow by adjusting the white screw on the voltage regulator clockwise or adjusting the air damper depending on your model. Please view your operating manual for instructions on for more information on making these adjustments.

There are several things that can help these heaters start in frigid conditions below 20 degrees. This is a primary concern when using diesel fuel since it has a higher gel point temperature. Therefore, our top recommendation is to add some Frigid Fix Diesel additive to your fuel in winter. You can purchase this additive HERE. This is the only additive that is fully supported by SunFire and covered under warranty.

We also sell heaters that wrap around your fuel filter if your heater model does not include one as standard. You can purchase HERE.

Adding some kerosene to the mixture can also be used instead of using Frigid Fix additive. However, kerosene burns cooler than diesel and adjustments will be required to increase the fuel flow and perhaps lower the air intake to produce a hotter burn running kerosene.

Yes. Off road or "red dye" diesel is safe to use and covered under warranty.

Parts can be purchased from your local SunFire Dealer or directly from SunFire HERE. Find your local Dealer HERE.

We have a 2-year bumper to bumper limited warranty on all parts. Contact a local dealer for support or call our free technical support line M-F 8am-4:30pm at (608) 527-9141.

Get full warranty information here.

We do offer free technical support for the life of your heater, but they can also be serviced by Authorized SunFire Dealers. Find your closest dealer HERE. Or contact us at (608) 527-9141 or fill out the form on our contact page HERE for direct assistance.

Yes, if you are reasonably handy with tools you should be able to handle needed repairs yourself. Our technical support department is here to help and walk you through any issues you may have. We offer free technical support for the life of you heater. Our team is available M-F 8am-4:30pm at (608) 527-9141.

Yes, there is no problem using an 800W minimum pure sine wave generator. If
your generator hasn't been used in several months, let it run for approximately
15-20 minutes to build a proper charge in the capacitor before using your Sunfire
with the generator.

Yes, but it does require a pure sine wave inverter with a minimum capacity of 800 Watts. This type of inverter is common in many construction and trade vehicles.

Jet-A fuel is not a fully approved fuel. However, Jet-A is a high refinement of kerosene, and if this is your only fuel source, please contact technical support for adjustments that will be required to test and run this fuel through your heater. Call (608) 527-9141.

No. SunFire heaters use a special filter made for diesel/kerosene fuel at a very low micron levels. Use of any other filter can void your warranty. You can purchase a fuel filter here.

NO! Gasoline is an extremely volatile fuel that can start a fire and be very dangerous to run in the heater. If any gasoline has been added, follow this process:

Remove the drain plug on the bottom of the fuel tank to drain all of the fuel. If there is any gasoline in the fuel lines, please disconnect all fuel lines and drain all fuel, including from the fuel filter. Then fill with diesel or kerosene and prime the fuel pump before starting.

Yes, proper ventilation is required. The process of burning fuel always consumes oxygen. With a lack of oxygen, the flame may go out.

Therefore, it is best to allow fresh air to enter an indoor workspace using the heater. The smaller the space, the more oxygen replenishment required. This is standard for all open-flame products, such as heaters used indoors.

No. SunFire heaters are not rated to be used inside a household living residence.

No, this is not normal. If your Sunfire heater is giving off excessive fumes
or smoke, ensure that the nozzle, fuel filter, and electrodes are clean, and
the blower is unobstructed. To clean the nozzle, watch our instructional
video HERE.
If the components above are clean and unrestricted, the unit will likely
need flame adjustment. Flame adjustment is located on page 22 to page
24 of your Operating Manual. 

The float will read empty with approximately one gallon of fuel left in the tank to prevent fully running out and losing prime that can choke the flame as the heater runs out of fuel.

Kerosene fuel burns at a cooler temperature than diesel fuel and can even run with a slight odor or minor smoke. For a proper burn with kerosene, you may need to increase the fuel flow on the pump up to one full turn and decrease the air intake adjustment to let in slightly less air to produce a hotter burn. For assistance, please contact technical support at (608) 527-9141.