Leaking heater core
if the mist is water, it's just condensation. but if it's antifreeze then you have a leak in your core. If it's water it will evaporate without leaving a stain, if it's antifreeze it will streak when you try to whip it off.
A fine mist coming from the air system is engine coolant. The most common cause is a leaking heater core.
Heat is coming from the engine.
Sounds like the heater core is leaking!
Heat would flow from the air coming out of the floor vent to the cooler air in the room. The warmer air is at a higher temperature and naturally moves towards the cooler air to create thermal equilibrium in the room.
Maybe if u tried fixing it that wouldn't happen smartone
Is this vent in a car or house??
They are an undersea thermal vent or hydrothermal vent.
To properly install a dryer vent through the floor, you will need to cut a hole in the floor, attach the vent pipe to the dryer, and secure it to the floor using appropriate materials. Make sure the vent pipe is properly sealed to prevent air leaks and follow all safety guidelines to avoid fire hazards.
It is a geyser in the sea floor
It could have a hole or sometimes there is a vent on top and if there is too much pressure it will spit it out the vent . Source : my dad
The standard floor vent size for most residential buildings is typically 4 inches by 10 inches.