I'm very seriously considering a wood fired boiler before next winter. Boiler make/model is TBD. Right now I'm trying to conceptualize how I can easily integrate it with my current propane fired radiant heat system. The current boiler has iron pipe. It is either 1.25 or 1.5" pipe into and out of the boiler. Single zone with one circ pump. I have circa 1960 radiant panels throughout. The house has received numerous insulation improvements over the years so I probably have way more baseboard than is currently required. Could it be as simple as adding a plate exchanger to the cold side of the propane boiler? And somehow control the existing pump with another thermostat?