Coming from a tech, yes dude wtf 💀 you have something called return grills, any smoking of drugs or cooking meth or etc will be sucked in through a return duct and goes through your air handler and back into the supply ducts into your rooms. So if you were smoking weed yes the air conditioner would just spread the smell in every room with a supply register.yea but it also has a down site, we cant use the none existing air-con for heating, these run cheaper if we would had them
i also really like these central air filter systems you got there, but something i always wonder about them because i smoke weed inside, could you smell it in the whole house or are the filter thaat good?