Does this main feed line vent look correct?


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Old 07-19-18, 12:43 AM
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Does this main feed line vent look correct?

This is the main feed line for my Hvac system. Obviously when it is running, the cold/hot air is blowing through the holes where they cut and added the ducting. Did they incorrect install the duct, or were they just suppose to mastic around it?
 
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Old 07-19-18, 04:49 AM
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I would expect to see that joint taped and/or sealed with duct putty.
 
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Old 07-19-18, 05:22 AM
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Its also not insulated. If this is an attic this is a big problem.
 
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Old 07-19-18, 09:56 AM
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What's the highest quality joint tape and mastic?
 
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Old 07-19-18, 11:10 AM
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I normally use 3M 3350 which is a plastic/aluminum tape. I also use a 3M 1580 aluminum foil tape if there are large gaps or openings to cover.
 
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Old 07-19-18, 12:52 PM
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I have the tape. Do you think Fiberglass mesh tape with mastic would be the best approach to fill/seal around that duct instead of foil tape?
 
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Old 07-19-18, 02:51 PM
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I have never used that method.
 
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Old 07-19-18, 05:44 PM
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Use the foil tape..... it will do a good job and stick well.
 
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Old 07-20-18, 05:41 AM
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Mastic will last forever That would be my choice
 
 

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