|
These rooms that have no good air flow,do they have any RETURN air?
If they do have return and still are low in airflow then the duct system could be in need of a"tune-up". This is done by dampering off some of the airflow to the rooms that have a great air flow thus giving more air to poor ones.
Note; there is no rule of thumb when it comes to PROPERLY sizing a duct system. It is done by using heat loss/gain calculations( Manual J and D ) from the location, orientation and construction , insulation, etc, of the home.
|