Dampers for duct work


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Old 07-24-08, 07:54 PM
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Dampers for duct work

Is installing dampers as easy as it appears??? It looks as i can cut the duct work place the damper between the cut fasten the duct work to the damper with the long zip ties and insulation tape. Am I missing something? Also what is an easy way to test which duct work is for which room?
 
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Old 07-24-08, 08:09 PM
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Are you trying to zone a system or don't have any dampers period?
 
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Old 07-25-08, 10:37 AM
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I am just trying to redirect some airflow rooms that are not used to rooms that are used. I was told you can put dampers at the start of the duct work for the register you dont want airflow going to so the airflow will down the duct for the rooms in use. If you have other suggestions just let me know.
 
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Old 07-25-08, 02:57 PM
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Ohh k, I understand. Some experts can chime in, but I know that you have to becareful sometimes blocking off certain supply or return vents.
 
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Old 07-25-08, 03:09 PM
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For round duct you have to pull the duct apart at a joint and install the damper in a section of the duct far enough away from the joint that the operation of the damper is impeded by the joint.

You do have to be careful as suggested because you can not cut down the overall airflow too much.
Closing of a duct will not divert all the air to the remaining ducts.
Friction losses could see you loose half the air or more.

You might find it simpler to install grills that you can close or as an experiment block off some of the registers with tape to see if you have any improvement to your airflow.
 
 

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