I have a few videos. please wait a while after the advertisement.
When I turn the fan at minimum speed, you will see big smoke
When I turn the fan at half speed, you will see the long flame, about 1' to 2' feet length
When I turn the fan at full speed, you can nearly not see any flame, but it is VERY HOT. I can not mearsure the temerature, or it will burn my probe.
My IQ still can not understand how explode happened.