My home heating system is going south. I am currently heating with #2 heating oil and a forced hot water system as are most people here in the northeast. The tankless hot water system is beginning to leak and I am told it cannot be repaired. I am also told that I can no longer get a cast iron boiler, that only steel boilers, which rust out in about 20 years are available. With rising oil prices I am at least considering propane as a fuel. My service technician said that "they" are coming out with a new boiler shortly that has a gun which can use either propane or oil. If this is true, might it be possible to continue to use oil and then switch over to propane when or if the price differential warrants it ? Being retired and on a fixed income, I don't want to have replace a boiler every twenty years. Can anyone advise me about 1. the dual gas/oil boiler 2. the existence of cast iron boilers 3. durability
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