Why can Landvac tempered vacuum glazing be applied to passive buildings?
2023-07-27
To improve the thermal performance of doors and windows, its core work is to reduce the heat transfer from the high-temperature area to the low-temperature area to reduce heat loss. Heat transfer is carried out through conduction, convection and radiation, so all energy-saving measures for doors, windows and curtain walls are carried out around these three ways.
Windows and doors are a system product that combines various materials. The heat transfer coefficient of the entire window is related to three factors: glass, profile and insulating glass partition. However, the strict low energy consumption index of passive low-energy buildings mainly depends on the door and window glass, so the glass part that occupies most of the area becomes the top priority to meet this index.
The heat insulation effect of LandVac vacuum glass exceeds that of a brick wall with a thickness of 1.5 meters, which is 4 to 6 times that of ordinary insulating glass, and the U value (also called heat transfer coefficient or K value) is as low as 0.4 W/m2·K (European IFT laboratory report).
The expected service life of LandVac tempered vacuum insulated glass can reach more than 25 years. It has a high vacuum cavity, which makes the heat transfer as low as 0.4W/(m2·K).
At the same time, the thermal insulation performance of Landvac vacuum glass is 2-4 times that of insulating glass, and 6-10 times that of single glass. It can meet the requirements of international passive houses for the heat transfer coefficient of doors and windows when used independently.
