Dyna-Glo Workhorse Forced Air Heater
The Dyna-Glo Workhorse heater is engineered for professionals and serious DIYers who need reliable warmth in large, drafty spaces. We built this forced air heater to handle garages, warehouses, barns, and construction sites where central heating isn’t an option.
Our Workhorse runs on kerosene or diesel fuel, delivering up to 135,000 BTU of continuous heat with a coverage area of 3,400 square feet. The heavy-duty steel cabinet withstands the bumps and scrapes of daily job-site use, while the built-in thermostat lets you dial in your target temperature and walk away.
We included a built-in fuel gauge and an oversized 10-gallon fuel tank, so you can run all day without constant refills. The industrial-grade axial fan moves warm air quickly and evenly, and the continuous electronic ignition means no more wrestling with manual lighting.
- 135,000 BTU output heats up to 3,400 sq ft
- 10-gallon fuel tank for extended runtime
- Burns kerosene or diesel fuel
- Built-in adjustable thermostat with automatic shutoff
- Heavy-duty steel housing with powder-coat finish
Fuel capacity and runtime you can count on
The 10-gallon fuel tank on the Dyna-Glo Workhorse heater is one of the largest in its class, designed specifically for professionals who can’t afford to stop work every couple of hours. At maximum output, you’ll get roughly 8-10 hours of continuous operation on a single tank, depending on ambient temperature and thermostat setting. The transparent fuel gauge is mounted prominently on the side, so you always know how much fuel remains without opening anything or guessing.
We recommend keeping a 5-gallon jerry can of K-1 kerosene or diesel on hand for midday top-offs during especially cold stretches. The wide-mouth fuel cap unscrews easily even with gloves on, and the tank sits low in the chassis to keep the center of gravity stable when you’re rolling the unit across uneven floors.
Thermostat control and safety systems
Every Dyna-Glo Workhorse heater ships with a built-in adjustable thermostat that cycles the burner on and off to maintain your set temperature. Once the space reaches your target, the heater throttles back automatically, saving fuel and preventing overheating. The high-limit safety switch cuts power if internal temperatures climb beyond safe thresholds, and the flame-out sensor shuts off fuel flow immediately if the flame extinguishes unexpectedly.
We also include a tip-over switch that kills the ignition if the unit gets knocked over. These overlapping safety layers give you peace of mind whether you’re working solo in a shop or running the heater overnight in a barn.
Portability and job-site durability
At roughly 70 pounds empty, the Workhorse isn’t a lightweight consumer heater, but it’s still manageable for one person thanks to the oversized pneumatic wheels and welded steel handle. The wheels are designed to roll over gravel, cracked concrete, and frozen ground without sticking, and the powder-coated steel cabinet resists rust even in damp environments.
We reinforced the corners and edges because we know this heater will get bumped by forklifts, knocked by lumber, and stacked in truck beds. The same construction philosophy that guides our torpedo heater designs carries through here: build it heavy enough to survive years of commercial use, then back it with a warranty that proves we stand behind the engineering.
Portable heating solutions from Dyna-Glo
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Common questions about the Workhorse forced air heater
Yes, the Workhorse is designed to burn either K-1 kerosene or clean diesel fuel. We recommend K-1 kerosene for the cleanest burn and least odor, but #1 or #2 diesel works fine as long as it’s relatively fresh and free of water contamination. Avoid off-road diesel with high sulfur content, as it can leave more residue and produce stronger fumes.
Runtime depends on your thermostat setting and ambient temperature. At maximum continuous output, expect 8-10 hours per tank. If you’re running the heater in thermostat mode where it cycles on and off to maintain temperature, a full tank can easily last 12-16 hours or more. The built-in fuel gauge lets you monitor remaining fuel at a glance.
Yes, the Dyna-Glo Workhorse needs a standard 110V grounded outlet to power the electronic ignition system, the axial fan, and the thermostat controls. The heater draws roughly 5-6 amps during startup and settles to about 3 amps once the fan is running steadily. You cannot operate it without electrical power.
The Workhorse includes a high-limit safety switch that shuts off power if internal temperatures exceed safe thresholds, a flame-out sensor that cuts fuel flow if the flame extinguishes, and a tip-over switch that kills ignition if the unit is knocked over. These overlapping systems protect against overheating, fuel spills, and accidental flame loss.
Maintain at least 6 feet of clearance in front of the heat outlet and 3 feet on the sides and rear. Keep the heater away from flammable materials like paint cans, gasoline, sawdust piles, and fabric. Always operate the Workhorse in a well-ventilated space, since it consumes oxygen and produces carbon monoxide like any combustion heater.
The Workhorse is designed for well-ventilated spaces like garages, warehouses, barns, and construction sites. It is not intended for living spaces or tightly sealed rooms. Always ensure adequate airflow by cracking windows or doors, and never operate the heater in an enclosed bedroom or occupied living area. Use a carbon monoxide detector as an additional safety measure.
Inspect and replace the inline fuel filter every 50 hours of operation or at the start of each heating season. Clean the burner nozzle after 200-300 hours of use by soaking it in kerosene and blowing it out with compressed air. Check the ignition electrodes for carbon buildup and wipe them clean as needed. Before off-season storage, run the tank nearly dry and treat remaining fuel with stabilizer.