Furnace install. Removed old unit with filter rack. Dropped liner and sealed with high temp. Installed new furnace in base with new filter rack. Grade b2f, and s2s. Did not need to make a transition, but modified plenum. Installed new 4” c vent to hwt and re lit it. Hooked up gas and leak checked. ABC cored a hole below the dryer vent. Had to cut a hole in the ceiling to check for obstructions. Pieces on site. Ran single 3” vent pipe to furnace. Intake is a 2” elbow. Ran drain to floor opening. Hooked up high and low voltage, re using the existing relays and humidifier xfmr. New t stat and 2 co detectors. Ran furnace and checked temps and pressures. Cleaned up Tech came out to perform quality assurance check tech inspected furnace and outdoor venting. Everything looks good. Tech turned off the program setting on the thermostat so now when the client sets it to a specific temperature it’ll stay at that temperature. Client is happy with the install and thank us for coming out today.