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Why is it in Hollywood movies every time there is a vent or AC unit someone has fixed little ribbons on it? Is that a thing americans do? Why? The vent in this movie is close to the floor in the toilets of a train. This implies someone got on all fours ON THE FLOOR OF A TRAIN'S BATHROOM to stick those ribbons there for a reason i can't even begin to comprehend.
Its hot enough to catch wood on fire… thats why metal ducts have very specific code clearances to combustible's… yikes… yeah thats the education level on this topic here…? The duct gets a lot hotter than the air coming out of it… try touching an operating one sometime…
Your ducts are emitting 250 C hot air? Because that's the ignition temp of wood. Should have told us you were working at camp Dante. The actual reason combustibles are supposed to be kept away from air ducts are because, in case of an actual fire, it prevents the fire from spreading via superheated air in the ducts. There is no way it happens during normal operation.
Now you've gone and broken the laws of physics. The duct would be exactly the same temp as the air coming out of it, or significantly lower if insulated on the inside. The only reason it seems hotter is because it has higher thermal conductivity.
Oh, the irony
thanks because his comment about catching fire is one of those things thats so ridiculous. Those electric warming quilt tables and halogen lights are way more a fire hazard.
Kotatsu? Because they're actually quite safe.
exactly.
It's a way to tell if the air is flowing cause you can see the ribbons move with the air. Hollywood thinks it looks good and makes it easy to let the viewer know the air is flowing so they use it all the time.