"Stormin Mormon" wrote in message
...
I could be wrong but:
Conduction seems to be limited to within a solid, or from the surface
of a solid to that part of a liquid or gas in contact with the solid.
CY: I'd think that conduction is possible within gasses,b ut much less
so. Cause they would be more likely to convect.

Take a look at sealed double glazing.... The gap between the panes is
choosen so that it's as large as possible (to mimimise conduction losses)
but not so big that it allows convection losses.

It's worth noting that convection is only an issue because conduction occurs
between the gas and glass. If there was no such conduction it wouldn't
matter if the gas had convective flow.