I am buying a early 1950's home in Montana, the house originally had a oil fired boiler (still there don't know if it works) and base board radiators. My question is are old baseboard units OK to use if they don't leak or is today's technology in baseboard units that much better? and if i want to revive this system with a propane boiler unit how would i size it? I read the spirited posts on sizing and would like to know if i am wasting my time and money reviving this system. Thanks Bill