The safe answer is, "you don't" however if you must, you should seek guidance from a structural engineer with a residential construction background.
When you say "exhaust vents in your ceiling" I assume you are referriong to the heating and AC vents inside your house and not the roof vent on the outside used to vent the attic. It is most likely that the duct work was ran in the ceiling for ease of installtion or the house may be built on a slab and they did not want to run the duct work through the slab.
The AC duct's are in multiple places in the home. The main duct would be on the main floor where the air conditioning can keep everything cooler. The duct is located on the floor in the main part of the house.
is AC, bro...
ac current
I am not sure about ac Moore but I know you can get it at walmart
67%
some AC duct is made of insulation wraped in foil it could be a number of things ei. old duct to rodents
How you can find out is stop being lazy ,get up , go to ac , and find out yourwelcome :)
An Air Conditioning (ac) register is the little grille in the ceiling where conditioned air comes into a room.
should be on floor.
Someone can get some well paid AC duct cleaning service jobs in the US from a number of websites such as Monster, Workopolis, or the government job bank for their state.
My parents did it with existing ductwork.