AirStreamTM ---Radiation heating plays a main role during glass heating, while compressed air is injected into heating furnace, in which it brings certain amount of heat onto glass top surfaces and is helpful for even heating on-line Low-E glass, etc. LD-BE AirStream double bent bi-directional tempering furnace adopts AirStream heating technology, and this furnace has two bending quenching sections laying on both sides of the heating furnace. By loading the glass in different direction, the furnace can temper single curvature and double curvature bent glass for automobile. Glass can be tempered includes: on-line Low-E glass, extra white glass, silk-printed glass, pattern glass, tinted glass, clear glass, etc.