Would you or do you feel comfortable sleeping with it running? I am happy with a fire in my lounge room burning all night but theres no way I would leave my un flued gas heaters on all night.
It has two separate pipes, one exhaust and pipe for combustion air. Diesel is completely safe.
I'm going to install one of these soon, that way I can freecamp in the snow. It will pay for itself in two weeks.
If I direct the exhaust towards to water pipes that will stop them freezing up.