As per Heat Loss and Gain calculations, each room needs specific heating and cooling CFM, which are regulated by the Volume Damper. Below are the studies done based upon these Calculations for various sites. The studies only reflect the energy imbalance values, assuming that the damper is set to either heating or cooling position.

By installing the SLD (Self Locking Damper) the energy imbalance can be eliminated thus saving on energy bills.

Energy Imbalance study # 79

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Energy Imbalance Study # 109

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Energy Imbalance Study # 119

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Energy Imbalance Study # 120

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Reference links on Energy Imbalance in Residential HVAC System