When replacing metal ductwork do we also need to replace vent caps and does code require return ducts for all bedrooms?

Question

When replacing metal ductwork do we also need to replace vent caps and does code require return ducts for all bedrooms?

Asked by Toni Morse

we live in broward county, fl. ductwork is 36 yrs old and leaking in a few different spots.

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Answers

Harold Remlinger, AIA, LEED AP, NCARB's picture

The answer is no if you are referring to the diffusers as vent caps, unless the size of the duct is changing.

You should have a return air duct for every occupied room except for bathrooms, kitchens and laundry rooms.

  • If it is impossible to install a return air duct in each room, proper air movement can be handled by installing transfer air vent between rooms such as bedrooms and common spaces such as hallways.
  • However this is not recommended.