Alex and Reno arrived ~11:30 am for the duct replacement. They pretty much worked non-stop through the heat of the day. Realizing the need for extra help, they called in reinforcements – Robert and RJ. The 4 of them continued working until the job was completed ~10 pm! It was a very messy job, removing ‘hard pipe’, working in tight spaces, and dealing with blown in insulation. But they persevered, and did a great job in cleaning up. I am very pleased with the results, and plan on calling Kahl for any future HVAC maintenance and repair.