There is a vent in the duct directly above my furnace. This is in the air out side, not the return duct.

Is there a reason I should have this duct open? It was open when I bought the house a few months ago, but this seems like a waste, heating and cooling the basement.

If there is a reason to have it open, should it be open only during certain seasons? (Open for heating, closed for cooling, etc..)

This is an Amana AMEH800805CX. (pictured below)

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Looks like the supply side. Most likely previous occupants wanted to add a little heat/AC down there. Is it adjustable? If not you can add an adjustable register because you may find that the climate control added there was needed. Maybe for humidity, etc.

  • It is adjustable
    – rogerdeuce
    Jun 17 '18 at 17:56
  • Well you're all set then. If you have a little workshop down there and get a little chilly in the winter you can just crack it open a little. I've actually considered adding one in my garage, lol.
    – vin944
    Jun 17 '18 at 22:17

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