3/3/25 Televised all underground ductwork and furnace box. Cleaned all underground ductwork and furnace box. Prepared furnace box for trenchless spin cast mortar. 3/5/25 Applied Trenchless spincast mortar to all underground connections and elbows. Rebuilt furnace box and all register vents with trenchless spincast mortar as well. 3/6/25 Applied first application of duct armor to all underground duct work. 3/13/25 Applied second application of duct armor to all underground ductwork and furnace box.