Hybrid Boiler Plants w/ Jim Devlin

HVAC School - For Techs, By Techs · Apr 25, 2019 · 49m

Jim Devlin from Weil-McLain joins us to talk about high-efficiency and cast-iron boilers. He also explains how to use them together in a "hybrid" configuration to serve your customers.

Cast-iron boilers are standard-efficiency boilers. These boilers are "standard-efficiency" because they have higher return water temperatures; you typically measure about 330 degrees in the flue. Conversely, high-efficiency boilers have much lower return water temperatures, only around 180-190 degrees in the flue. The goal of a high-efficiency boiler is to get more BTUs out of the fuel, so your flue gases will…