Quote:
Originally Posted by Teed_Off
Make sure the dampers on the registers are adjusted properly. Are they fully open in your primary bedroom, and are the dampers in rooms that are cold partially open/mostly closed?
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You need to take into account the loss of cfms due to the run of the duct system too. Thirty years ago it was all a big secret on HVAC systems, now you have the internet. Research, research, research. Setting vents properly in rooms determines airflow also. The room closest will get full pressure, so you adjust the vent. That's why there is an adjustment either on the primary vanes (hard to see) or secondary vanes (obvious).