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Old 10-21-2008, 11:11 PM   #1
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Duct problem


I have a forced hot air heating system in my home. There are two bedrooms that virtually get no heat. Barely any air comes out of the vents while other rooms get plenty of warm air. There either has to be a duct separtion somewhere in the wall or floor or there is a buried damper somewhere that is blocking the flow of air. I've heard of something I think is called "videoscoping", where a camera built into a cable is dropped down the duct to see where the problem might be. Anyone familiar with what I'm referring to? Please advise.

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Old 10-22-2008, 08:40 AM   #2
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Duct problem


where is your duct work. is it buried - inaccessible?

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Old 10-22-2008, 01:27 PM   #3
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Duct problem


I woudred what happened to that "videoscoping" thing after my colonoscopy last year <;-}
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Old 10-22-2008, 04:59 PM   #4
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Duct problem


The duct work is almost exclusively buried.
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Old 10-22-2008, 05:00 PM   #5
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Duct problem


You woudred??????
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Old 10-22-2008, 06:36 PM   #6
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Duct problem


shut the rooms that are blasting and see if you get anything or noise of the air leaking on closed dampers........being buried are you talking metal duct work or flex laying under the houses foundation and run up?
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Old 10-22-2008, 08:54 PM   #7
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Duct problem


It's metal ducts. The house is a split level so the duct work travels three floors up with a main trunk line buried in the wall. I don't think there's any way to hear air leaking even with a stethiscope.
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Old 10-23-2008, 08:58 AM   #8
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Duct problem


Did you have adequate air flow at one time? Is this something new?
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Old 10-24-2008, 07:17 PM   #9
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Duct problem


The problem has always existed. We've owned the house over 30 years. Installed a new more powerful furnace about 15 years ago.
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Old 10-26-2008, 09:20 AM   #10
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Duct problem


Then is has probably always been caused by undersized duct work.

Increasing furnace size makes it worse. As the other rooms just heat up faster.

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