This is a clear hole in which you can see air leaking out of.
The insulation is collecting a lot of dirt in the spot where air is shooting from the duct joint.
Foam covering duct not allowing any air to escape.
Joints where ducts meet are heavy leakage spots, that's why the whole bottom of this flex hose is sealed.
All exposed ducts were sealed
These customers in Toms River didn't understand why cranking their HVAC system to top levels still wasn't making their home more comfortable! After an in-home energy audit Dr. Energy Saver found that their attic ducts were leaking a large amount of air, therefore the conditioned air was never reaching them. To solve this problem Dr. Energy Saver encapsulated their ducts with foam board and then spray foamed the edges to seal all the air inside of the ducts.