“I have three favorite supply houses. Two have guys who have been in the business about as long as I have. One is about 75 years old. He works part-time during the heating season. He and two other guys really know the hydronic-heating supply business. They actually understand how a commercial, gas, power-burner functions. They know what a fire-tube boiler is, when compared to a water-tube boiler. They are not at all cocky. I suspect they are paid well and they should be. I am certain two of them have received offers from the competition over the years. They seem to rarely take off from work. Others count on them for information and they share it willingly. They go to just about every seminar their company offers, and they always ask questions. The oldest one used to teach boiler controls, wiring, combustion, and even pneumatic controls. I have two of their personal phone numbers, but I have never needed to call them (yet).”