LandVac Vacuum insulated glass is a type of window glazing used to historic and heritage window with which can have a better performance in thermal insulation and energy saving than normal insulated glass.

The most import factor is the slim structure. It can fit the existing frams, former consist of single glass, and features better thermal insulation and energy saving properties.

The u-value of Landvac vacuum glass can be as low as 0.4(W/m2·K).