Diesel & Kerosene Heaters
20kW Diesel Heater for Marquees and Temporary Structures
Model: FS20-21B
The FS20-21B is a 20kW direct-fired diesel and kerosene heater from our 10kW to 190kW forced-air range. It burns diesel or kerosene in a 441-grade stainless steel combustion chamber rated to 1000°C and blows the heated air straight into the working area through a high-power enclosed fan, so heat arrives within seconds of ignition. Direct-fired units raise the incoming air temperature by 40–60°C and are intended for well-ventilated sites with an air change rate high enough to carry the combustion products away — construction and renovation work, workshops, warehouses, barns, factories, dock yards and rail or road works. Other 20kW direct-fired models sharing this output: FS20-23A, FS20-21A, FS20-19A. Tell us the destination market and we will confirm the voltage, plug and certification package that goes with this model.
Features
- 20kW suitable for marquees and temporary structures in cold weather
- Flameout protection cuts the fuel supply if the burner ever goes out
- 441-grade stainless steel combustion chamber, rated to 1000°C
- Multi safety protection: overheat cut-off, heat-dissipation protection, flameout protection, shutdown protection and error indicator light
- Fuel: diesel or kerosene only — petrol and bio-oil must not be used
20kW Diesel Heater for Marquees and Temporary Structures
The FS20-21B is a 20 kW diesel forced air heater intended for temporary structures — marquees, event tents, site cabins and temporary accommodation — where heating has to be brought in, run and taken away again without any installation.
Marquees lose heat through every surface, so the requirement is fast high-volume warm air rather than a gentle radiant glow. Flameout protection is fitted so the fuel supply is cut automatically if the burner goes out, which matters for a unit running unattended overnight in a fabric structure. The 441-grade stainless steel combustion chamber is rated to 1000 degrees C, and the full protection set is built in: overheat cut-off, heat-dissipation protection, flameout protection, shutdown protection and an error indicator light. Fuel must be diesel or kerosene only.
As a manufacturer we build this 20 kW diesel heater as a wholesale and OEM line — your voltage and plug standard, logo, paint colour and packaging. Direct-fired units require well ventilated space, suited to event hire, trade and agricultural buyers. Ask for the diesel heater catalogue, certificates and test reports.
| Model | FS20-21B |
|---|---|
| Product Name | Diesel Kerosene Forced Air Heater |
| Heating Output | 20kW |
| Fuel Type | Diesel / Kerosene — diesel or kerosene only, never petrol or bio-oil |
| Heating Type | Direct fired — open flame heats the air stream, delivered by fan |
| Combustion Chamber | 441-grade stainless steel, rated to 1000°C |
| Electrical Load | Fan motor, ignition and fuel pump only — approx. 0.4–0.5 kWh per hour at 50kW output |
| Recommended Use | Event marquees, temporary site accommodation, outdoor working areas |
| Technical Data Sheet | Full specification, manual and spare-parts list available on request |
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