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Key Features
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Simple gas valve switch changes between natural gas and propane, with a safety lock to fix the valve in position
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20 in duct is ductable up to 50 ft, delivering warm air exactly where it's needed
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Can be placed in the heated space with exhaust ducted outside, reducing heat loss over time
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Clean burn design produces very low CO and NOx emissions
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Internal onboard diagnostics monitor heat output and system health
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Heavy-duty 10 in pneumatic wheels support easy jobsite mobility
How It Compares
How The HeatStar HS4000NG/LP Compares To Other Direct Fired Heater Options
Contractors evaluating direct fired heaters usually face this question: should I get an oil-based direct fired heater like the HS3500DF, this dual fuel HS4000NG/LP for clean natural gas or propane burn, or step up to the HS6000DF for maximum output?
| Feature | HeatStar HS3500DF, 360K BTU, Oil-Based Fuels | HeatStar HS4000NG/LP, 400K BTU, Gas/Propane | HeatStar HS6000DF, 600K BTU, Oil-Based Fuels |
|---|---|---|---|
| Fuel Type | Kerosene, diesel, fuel oil, jet fuel | Natural gas or propane, switchable | Kerosene, diesel, fuel oil, jet fuel |
| Emissions | Standard combustion byproducts | Very low CO and NOx, clean burn | Standard combustion byproducts |
| Ducting | Not specified as ductable | 20 in duct, up to 50 ft | Ductable up to 50 ft |
| Best Suited For | Job sites already using liquid fuel | Sites with gas/propane access wanting the cleanest burn | Largest job sites needing maximum output |
Product Description
The HeatStar HS4000NG/LP direct fired heater features a high output of 400,000 BTU/hr, drawing in cold air to create clean and reliable heat. This dual fuel heater uses natural gas or propane, with a simple gas valve switch to change duel, with a safety lock to keep the valve in a fixed position. The 20 In. duct makes the heater ductable up to 50 Ft., providing warm air where it’s needed. Or, the heater can be placed in the space to be heated, with ducting from the exhaust leading outside, lessening heat loss over time.
- Provides 400,000 BTU/hr of heat
- Runs on natural gas or two 100 Lb. propane tanks
- 20 In. duct is ductable up to 50 Ft.
- Equipped with heavy duty 10 In. pneumatic wheels
- Ventilation only mode for running fan while heat is off
- Clean burn with very low CO and NOx
- Internal onboard diagnostics to monitor heat
- Powerful fans ensure high static pressure
- Compatible with optional accessories like thermostat, duct adapters, and chimney kit
Full Spec Sheet
| Model | HS4000NG/LP, GWG311220 |
| BTU Output | 400,000/hr |
| Fuel Type | Natural gas or propane, dual fuel |
| Fuel Source | Natural gas line or two 100 lb propane tanks |
| Duct | 20 in, ductable up to 50 ft |
| Wheels | 10 in pneumatic |
| Modes | Heat, ventilation only |
| Emissions | Very low CO and NOx |
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