How to abandon A/C duct

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  #1  
Old 01-16-18, 03:52 PM
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How to abandon A/C duct

I'm remodeling a room and in order to raise the ceiling to my desired height, I need to abandon one of the AC duct runs that feeds another room. As the attached picture shows I have 2 ducts coming through a solid concrete wall. I have no access to the the duct work on the other side of the wall without cutting through the drywall ceiling. I would like to add a wall diffuser over the doorway and abandon the other duct.

1) Do I have any options without cutting out the ceiling on the other side of the wall?

2) If I have to cut out the ceiling on the other side of the doorway to access the ducts what should I do ?

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Last edited by PJmax; 01-16-18 at 04:09 PM. Reason: added 2nd enhanced picture
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Old 01-16-18, 04:11 PM
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How high are you raising the ceiling ?
I see a drain lines and water lines. What about them ?

It's hard for us to tell you what to do without knowing what those lines are.
Are they two supply lines.... one for each room ?
Is this A/C only ?
 
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Old 01-16-18, 04:17 PM
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The ceiling is going all the way to the top. My question is about the A/C only; those are 2 supply lines.
 
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Old 01-16-18, 04:58 PM
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Even if you don't do anything right away, close up the ends, and or stuff insulation on the ends, to protect from fire or CO leaking through out the house.
Sid
 
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Old 01-17-18, 06:40 AM
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Never a good idea to have flex duct above a finished ceiling. What are you going to do for HVAC in the other room if you remove the duct? What about this room? You are going to have to add the air back somehow?
 
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