The vast majority of Thai windows are of the aluminum frame/single pane or upvc frame/single pane cheap variety.
There's no much reason to discuss similarly built dual pane windows, if available, since they would be of similar quality.
What normally referred to dual pane windows in this discussion is associated with windows manufactured up to the western standards by farang-run shops (upvc, complex shaped frames, thermal brakes between the panes, coated glass). Not sure if they offer inert gas filling over here.
In the west most of double pane windows come argon filled.