Televised ducts under slab floor. Ducts are spiral wound galvanized ducts that are extremely rusted and deteriorating. Suggest spin cast mortaring ducts to restore the structure then spray lining the ducts with Duct Armor duct lining material. Downspouts need to be run out above ground and the one feeding into the ground to the right of the patio has frozen and split the seam so water can leak out.