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High Efficiency Wall Hung Reliability
I am looking to install a new boiler in my house. I have had a few companies come out and give me their thoughts. One suggested a System 2000 oil boiler, another a direct vented oil boiler as well as a Rannai Combo unit and the third suggested a Lochinvar Knight wall hung unit. Switching to propane from oil would save us space in a couple of places in the basement (which is being finished into living space and the reason for the change to a boiler). Cast iron boilers have been around "forever" but the high efficiency wall hung units have not...should I be concerned about the "life expectancy" of a high efficiency wall hung unit? Reliability? I do not have any experience with these, so any help is appreciated.