Retrofitting can be defined into two major categories

Duct Leakage and Integrity

 

Air ductwork can often be a culprit of air leakage.  In problematic cases, fan energy consumption will increase to maintain pressure in the duct.  This can cause up to 35% more overall energy use in the HVAC system.

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30% HVAC Energy Improvement from Duct Leakage Sealing!