Is there any chance this meets code?
The bathroom vents in the condo we are renting (built in 2008) weren't doing much, and after a little experimentation (no exhaust pull unless the furnace fan is on, no exhaust pull if the furnace closet door is open) I have concluded that the vents in the bathrooms are ducted to vents in the ceiling of the furnace closet, rather than ducted outdoors.
Any way that this meets code? If not, who is liable for correcting -- the condo owner or the sponsor they bought it from in late 2008?