Greeted Leslie and Mack, asked if they had any issues. Leslie took us to the basement and we began the inspection process. The first Peerless unit was started and we observed it cycle until it reach temperature. Inspected all the wiring along with the pipes and fittings. All is in excellent shape. We moved on to the second unit which was a very dated Hydrotherm unit. At face value the unit appeared very rough. Several items were cut off and disconnected. A lot of decay throughout the unit is very evident. Fired up the boiler and quickly noticed severe flame roll out coming out of the burner chamber. The unit is also in need of a burner service as to it is visually evident the combustion is compromised. The flames were yellow and orange. A clear indication of a red flag. Based on all the information gathered it is strongly recommended that no repairs be done to this unit. A new boiler should be installed! Worked up several options for the customers consideration. Had a FaceTime conversa