Where is the drianage hose for ac in a 1999 elantra?

In a 1999 Hyundai Elantra, the drainage hose for the air conditioning system is typically located under the vehicle, near the firewall on the passenger side. It allows condensate from the AC unit to drain outside the vehicle. If you're having trouble locating it, you might need to look for a small rubber hose protruding from the bottom of the evaporator case. Ensure that it is clear of any blockages to prevent water buildup inside the cabin.