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Old 08-02-2008, 01:10 PM   #1
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commercial: ceiling air vents dripping (kinda long story)


The air vents in the ceiling are dripping all over the tables in my restaurant. Not good for the diners! Anyway, a new food place being built nearby said they were having the same problem already and his contractor fixed it by putting these "sheets" of "something" on the back side of the vents-problem sloved. He said you can get them at the local stores. I went to the local home improvement box stores and no one knows a thing about them. He said they were squares with a nothch cut from outside to center and a hole cut out of the middle to fit around the duct work. and one side was silvery. The contractors, he said, just slipped them around the duct work and VOILA! Does anyone on here know anything about these mysterious sheets? Thanks in advance for any information, it will be greatly appreciated!
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Old 08-02-2008, 02:36 PM   #2
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commercial: ceiling air vents dripping (kinda long story)


Not familiar with the sheets you're speaking of, but I imagine that you need to have your ducts in the attic space insulated. The drips are condensation from the ducts since they're full of cool air in a warm humid environment.
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Old 08-02-2008, 08:04 PM   #3
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commercial: ceiling air vents dripping (kinda long story)


make sure your adjustable pully within the unit is for the fan is max'd out for the amperage off the tag.he must of lined the inside of the registers with some felt contact material.it you go to HD they have a spray felt paint try it on one register and see what happens.you basiclly want to remove the register place it flat down and spray the metal 360 degrees around...your dripping because the cold air is discharging over a warm surface and being metal doesn't help the situation.if you can speed the air up with a pully adjustment it might solve the dripping..air is moving slow over the grills and chilling them
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Old 08-03-2008, 09:42 AM   #4
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commercial: ceiling air vents dripping (kinda long story)


Do you mean ductboard?
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Old 08-03-2008, 11:24 AM   #5
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commercial: ceiling air vents dripping (kinda long story)


Thanks for the great the tips. I think the spray thing sounds like the answer, I'm going to tell my "handyman" about that. The sooner the leaks are stopped the better!
(ps: I don't know if it's called duct board. The person telling me about it didn't know what it was called or exactly what it was.)
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Old 08-03-2008, 07:15 PM   #6
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commercial: ceiling air vents dripping (kinda long story)


I had drips occur from the cold water pipes in my basement. I bought pipe insulation to resolve this prob.
I suspect that the cool, a/c air is cooling the register covers. When warm moist air is cooled by the cool cover, it gives up the moisture.
I would suggest that the metal register covers be replaced with plastic ones.
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