Just moved into an older house that has an existing hydronic baseboard heating system installed. It's connected to a boiler that burns heating oil. While the system is quite old, it still works. I've never lived in a house with this type of heating, but from my research I've learned how expensive and inefficient heating oil is, compared to more modern methods of environmental control.

Does anyone out there have any suggestions or experience on how this system can be repurposed to be made more efficient? Given that all this pipe has already been run, I'd prefer to find a way to put it to use over removing it entirely.