Televised and cleaned all underground ductwork. Applied trenchless spincast mortar to all elbows and connections in underground ductwork. Repaired furnace box and all register vents with hydraulic cement. 4/25/25 Applied first application of duct armor to all underground ductwork and furnace box. 5/1/25 Applied second application of duct armor to all underground ductwork and furnace box as well as all register vents.