Wall mount dyna glo model RMC-40NGT

Question

I picked up this heater at a garage sale to put in my garage to just keep the chill out through the winter. The unit has legs on it to put it in the on the floor but I want to put it on the wall. The people assured me it was a wall mount heater but I am nervous about burning my house down. Do I need special brackets to hang it? Do I need a fire backer behind it?Also...is it possible to put a thermostat to this?