Installed 2 8” patch liners on supply line feeding the two registers by the living room window. Applied spin cast mortar to all heavily rusted elbows and connections. Rebuilt plenum box with mortar. 11/19/25 Applied first application of duct armor to 200ft of 6” ducts. 12/1/25 Applied second application of Duct Armor to plenum registers and all duct runs.