What is the difference between the kerosene, diesel and propane versions?

They burn different fuels but work the same way: forced-air heat for a ventilated space. Kerosene and diesel models use a tank you refill; propane models run off a gas cylinder. Pick the fuel you can store and buy easily.

Can I use it in a home garage?

Only if the space is well ventilated. These heaters produce exhaust and need fresh air, so a sealed or attached garage is not suitable. A workshop with doors, vents or open airflow is the intended setting.

Does it have a thermostat?

Some models in the range offer thermostatic heat control, which cycles the burner to hold a set temperature. Check the specific model, since not every version has it.

How much space can it heat?

Output varies by model, and the practical area depends on insulation, ceiling height and outside temperature. Match the model's heat rating to your room rather than assuming one size fits all.

Is it safe to leave running unattended?

No. Open-flame fuel heaters should be supervised while running and shut off when you leave. The built-in fuel safety protection is a backup, not a substitute for sensible use.