How long does a full tank last?

At the rated 0.5 gallons per hour, the 5-gallon tank runs about ten hours at full output. With the thermostat cycling the burner, real runtime is usually longer.

Can it run on diesel instead of kerosene?

Yes. VEVOR lists both kerosene and diesel as fuel types. Kerosene burns cleaner and smells less, while diesel is easier to find and usually cheaper.

Is it safe to use indoors?

It is a combustion heater, so it needs ventilation and should not be used in sealed living spaces. Use it in garages, workshops and sites with airflow, and keep it away from flammable material.

Does it need electricity?

Yes. It runs on AC 120V 60 Hz to power the fan and ignition, so you need an outlet or generator nearby.

How does it compare with a 70,000 BTU propane heater?

Propane torpedo heaters of the same output heat similarly and avoid liquid fuel handling, but kerosene and diesel are often cheaper per hour and the 5-gallon tank avoids swapping cylinders.