Pulsing door...

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MagdalenaP

Burning Hunk
Nov 10, 2018
239
Tilbury, ON
Why does the fire (I can't seem to find another word here, sorry!) "pulse" sometimes when starting a fire? This is when the door is slightly cracked open, and moves in and out slightly. Is this dangerous?
 
That is just a fluid mechanics phenomenon. It won't hurt anything.