Can I run the diesel portable heater Travelbox inside my trailer with a window cracked?

Published 08/11/2025

Question:

Would it be okay to use the Travelbox 2.0 inside my tear camper if I leave a window cracked open for ventilation? — Greg W.

asked by: Greg W

Expert Reply:

No, I wouldn't recommend it, Greg, nor would Autoterm. The Autoterm Travelbox # AU36MR is built for outdoor use only. It exhausts diesel fumes, and even with ventilation, using it inside a closed space is risky.

You’ll want to set it outside and run the included 60mm duct in through a window or vent. It’s quiet and safe when used correctly, just don’t bring it indoors.

What type of trailer is this going on? Travel trailer or an enclosed diy trailer?

expert reply by: Andrew N