Working for a client in Bolingbrook today. Client has concrete ducts under the slab floor, which have metal fittings,. They are blocked at a tee where a plumbing fix was done. This blockage is stopping air from reaching the back of the house. To fix the problem, the floor will need to be broken up and the blockage removed. A televised duct inspection showed exactly where the blockage is, so we can remove it without causing extra damage.