Yup, that thing will heat your bus, no problem. Just be safe -- secure it well, install some heat shielding between it & nearby walls, and provide outside combustion air via an open window or vent. This is a well-done subject, so using the search function to look at previous discussions will give you a lot of info.
Lastly, typing in ALL CAPS makes your message less fun to read.
Hope this helps, and welcome to the site