Johns crew did a complete job for us. Old gas heater and all ductwork taken out of the attic and the old compressor removed from outside. Installed an all new Carrier system with new ductwork. Amazing how much less dust is in the house because of the new ducts. He also added an extra return in the hallway making the new system extremely efficient. Cleaned everything up after they were done. When One Hour makes promises for their services, they keep them. Will highly recommend.