My dad was a plant manager at a heat treating plant and worked there over 30 years. I remember he had me open up a huge furnace just to let all the super hot ai

My dad was a plant manager at a heat treating plant and worked there over 30 years. I remember he had me open up a huge furnace just to let all the super hot air blast over me, was pretty cool for a teenager. Not a fun place to work at in the summer though...