Duct & Vent Cleaning of America, Inc. was hired to clean the Ductwork serving the church when they underwent an Air Handling Unit (AHU) upgrade. On this project we contact HEPA vacuumed (2) large return grills located in the Pulpit area, the floor grill over the return duct in the Pulpit area, and supply vents running on the floor on both sides of the pews. We also cleaned the supply and return ductwork that is under the church and within a cement slab.