12-12-2024: reconnected duct pipes that were removed to fix plumbing and rebuilt wall of plenum box that was removed to fix plumbing, also cleaned all underground duct work in preparation for trenchless casting. 12-16-2024 Applied spin cast mortar to all underground duct work. 12-18-24 Applied first application of duct armor to all underground ductwork and furnace box. 12/30/24 Applied second application of duct armor to all underground ductwork and furnace box.