I was given a Schrader fireplace wood stove that I plan on using in my garage so it will only be used occasionally. Any info is appreciated. I noticed mine does not have the round knobs on the 2 doors but instead has one metal lever on the left door I’m assuming to adjust airflow. Also there’s a small plate on the very lower left side right at the floor line that has holes in it im assuming to let air in and also does this unit sit flat on the concrete floor?the bottom of the stove has a large hole in it so I don’t know if that’s to draw air into or not. Thank you