Cleaned all underground ductwork and furnace box. Applied trenchless spincast mortar to all underground ductwork and furnace box. Repaired furnace box and all register vents with hydraulic cement. 12/18/25 Applied first application of duct armor to all underground ductwork. Including furnace box and all register vents. 12/29/25 Applied second application of duct armor to all underground ductwork and furnace box.