Thanks to all who answered my question about tankless electric water heater s. I think I'll stick with an oil-fired unit. I got an estimate for two opt ions; I can replace the free-standing oil-fired unit for about $4,100, inst alled, or I can get an indirect water heater which runs off the oil boiler as a separate heat zone from the house radiators for about $4,900. I'll get a couple more estimates before making a decision, of course.
The indirect unit would reduce maintenance costs since I'd only have one bu rner going, but it would probably wear out the burner a year or so earlier from the increased usage. The free-standing unit is cheaper and will probab ly last 10-12 years, by which time I'll probably be in a rest home, while t he indirect unit should last much longer.
Any thoughts on indirect units? Thanks in advance for any advice.
Paul