Correction Check List:
- Remove return grill, and seal return cavity completely. To serve as a plenum.
- Remove all supply registers and caulk between can and drywall. The gap between the metal duct and the drywall itself.
- Reinstall supply registers and caulk around outside edge.
- Inspect ducting and plenums in attic, seal and repair any and all leaks in ducts and all joints and connections.
- Seal seams between furnace and platform, furnace and evap., coil and evap., coil and supply plenum.