After having a new oil-fired hot water boiler installed, I’m
considering the value in replacing some of my convector radiators with
cast-iron. But, not sure if it's worth the hassle. Which would feel
more comfortable and/or be cheaper to run in the long run? For
example, convectors require shorter more frequent boiler firings to
keep the temp steady in the house. And although cast-iron radiators
require longer boiler firing time to heat up, they stay hot longer.
Sounds like it’s an even wash either way, but your comments are
appreciated.

-Theodore.