I was wondering how dangerous is an heating vent as a fire hazard.
Can flammable material (cottons, linens, paper, carpet etc) catch fire if put on a vent?
Moreover, can objects fall inside an floor air vent and cause a fire?
Finally, if a towel or blanket is stuffed inside an air vent, is it a fire hazard?
I'm also curious about the chemistry/physics involved. It seems to me that the air coming from an heat vent is nowhere near hot enough to ignite most materials, but many people I know swear it can be a danger.