How much space will an 8 kW diesel heater heat?

8 kW is about 27,296 Btu, enough for a large garage, workshop or big van in cold weather. Real coverage depends on insulation and outside temperature, so treat it as a big-space heater rather than a small-room one.

Does it have a thermostat?

It has one heat setting and a maximum setpoint of 96 °F, so it does not modulate output like a thermostat-controlled heater. You switch it on and off with the LCD panel or remote.

What do I need to install it?

A diesel fuel tank and line, a 12 V power supply, and routing for the exhaust and combustion air. Plan the exhaust away from windows and vents.

Is it safe to leave running unattended?

It has an overheat cutoff at 518 °F, but a fuel-burning heater still needs a correct install with a sealed exhaust. Follow the manufacturer's clearances and never block the intake or outlet.

Can I use it in a camper or van?

Yes, this class of heater is common in van conversions, but the exhaust must vent outside and the fuel tank must be secured. Check local rules for fuel-burning heaters in sleeping areas.

The fuel pump ticks and the combustion fan runs continuously, so expect some noise. Mounting the pump with a rubber isolator and placing the unit away from the sleeping area helps.