AC super concentrated in the master bedroom


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Old 08-15-23, 11:18 PM
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AC super concentrated in the master bedroom

Our second floor has four bedrooms and it's noticeably cooler in the master bedroom when the AC is turned on. Is there a way to adjust the output to balance out where the cool air goes? I'm thinking it could just be a matter of adjusting the ceiling registers but also not sure if this was installed according to code either as the other bedrooms feel like they're 9į degrees hotter when it's running.
 
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Old 08-16-23, 01:02 AM
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You could have in line dampers as well as the ceiling registers that can be adjusted to balance out the flow of air between rooms!
 
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Old 08-16-23, 04:25 AM
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I am assuming you mean the AC supply comes into the second floor bedrooms via ducts in the first floor ceiling, otherwise the duct installation is wrong since heated air rises. The supply duct grate in each bedroom should have an adjustable shutter to manage the supply flow.
 
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Old 08-16-23, 04:47 AM
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Also keep in mind that the air must be able to move in order to cool or heat rooms. If doors are kept closed it can severely impact cooling by cutting the airflow to that room and since air isn't flowing to that room the excess goes to other areas that do have good airflow.
 
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Old 08-17-23, 06:39 AM
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Pilot Dane said:
Also keep in mind that the air must be able to move in order to cool or heat rooms. If doors are kept closed it can severely impact cooling by cutting the airflow to that room and since air isn't flowing to that room the excess goes to other areas that do have good airflow.
orielonline - Also, keep in mind that you may be lacking enough return air ducts in those other bedrooms that feel like they're 9į degrees hotter. To adequately balance the HVAC system each supply register needs a return air vent of an equivalent size located either in the same room as the supply register or available nearby without restrictions (i.e. closed doors) .

Many home builders and HVAC contractors simply do not put enough return air ducts in houses. In most cases additional return air ducts with vents can be added, which really helps to balance the airflow and provide good temperature control.
 
 

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