DIY Network

How to Replace Ductwork and Install a Return Vent

This homeowner's sink is leaking onto air ducts causing a nasty smell every time the air conditioning is turned on. Learn how to replace rotting ductwork and install a new return vent.

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  • metal vent
  • nails
  • duct tape
  • 2x4 boards
  • aluminum tape
  • screws
  • plastic rib
  • flexible air duct
  • insulated duct board
  • plastic ties
  • mastic adhesive cement


  • hammer
  • scissors
  • cordless drill
  • measuring tape
  • paintbrush
  • saw