There are many differences between gas and oil hydronics.The obvious one is that the burners and fuels are different.The controls,however,are typically the same-with some exceptions.In this series of articles,I am going to address some of the differences and how to work with them.Our emphasis will be on forced hot water and forced warm air systems used on both natural gas and propane systems.We will be emphasizing the older systems and not explore any modulating/condensing equipment.I want to address controls that are unique to gas.As we look into some more modern systems and what specific problems they present,it is important to understand the basic fundamentals associated with these systems.
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