I suspect Scott is spot on as well, but still don´t get it...
Why would any manufacturer do this, and turn away potentional customers like that?
Would demand very little effort and space, to ensure that a few always was in stock of these, when setting up to make the 110V heaters anyway.
The weird thing is, that the difference between 110V and 220v versions of the same 2½" heaters, declines from $33.20 to $29.85 if i order it with a power cord, which would indicate that the 220V cord is cheaper (which they could be, since they carry less amps, and therefore could use a smaller diameter).
But to make the confusion complete, they take the overall difference on the 3" heaters down to $13.70 without power cord, but then up to $14.20 with the exact same cords, indicating that the 220V cords suddenly is more expensive???