OK, so it CAN and HAS been done with success many times before. Which brings on the barrage of questions:
1. With the flat plate radiators, are there any general guidelines in upsizing to maintain comparable BTU output? Assume a drop of 50-60 degF source water temperature.
2. What about the mysterious desuperheaters? What temperature water can be expected out of them? Can they be rigged to a radiator in a room where the existing unit cannot be upsized (small bathroom, etc.)?
3. Once the system is modified, should the existing boiler thermostat be lowered, or if no thermostat, should a mixing valve be installed to lower its source water temperature? What kind of shutoff or disconnect should be installed to keep it from running when the new heat source is operating?
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