In article , "JR Weiss" wrote:
"Doug Miller" wrote:

You're apparently thinking of convection, which does indeed transport
heat
only upward.

Not quite...

NATURAL convection will tend to transport heat upward..

Merely "tend to" ??? Seems you misspelled "always". :-)

FORCED convection,

No such thing. If it's fan-forced, it's not convection.

as in a forced air furnace, can transport heat in any direction it is
directed by fans, ducts, etc. Wind tends to transport heat sideways in the
local case...

Wind isn't convection either.