By using high-performance Low-E coating, it also considerably suppresses radiation heat transfer and reduces the U-value of LandVac to 0.48 W/(m2•K). In the meantime, the thermal insulation performance of LandVac is 2 to 4 times better than insulated glass and 6 to 10 times than single pane glass. LandVac meets all international passive house heat transfer requirements on windows and doors in stand-alone applications.
The flexible edge sealing materials wakens the shear forces around the seams, avoiding the sealing failure caused by the brittle edge sealing material especially in the environment with big temperature difference between indoor and outdoor. With the assistance of built-in high efficiency getter material, LandVac can sustain its superior performance against harsh environments and material aging for a long time.
In comparison with triple-pane insulated glass, LandVac has merely one sixth of its thickness and weighs 10 kg less per square meter while managing a much better U-value. Meanwhile, less Low-E glass layers also allow higher transmittance and improved optical transparency.
| Product Type | U-value | Visble Light Transmittance | Thickness | Weight |
| LandVac4TL +0.3V+4T | 0.48 | 70 % | 8.3 mm | 20 kg/㎡ |
| Insulated Glass4TL+12A+4TL+12A+4T | 0.97 | 56 % | 36 mm | 32 kg/㎡ |
Low-E provided radiation rate of Low-E glass at 0.05
Dew condensation is caused by the temperature difference between the inner and outer surfaces of insulated glass. The high vacuum interspace of LandVac effectively eliminates the dew condensation phenomenon, while the outstanding thermal insulation performance ensures interior glass surface free of condensation even when the outdoor temperature falls to -40 ℃.
- Instuated glass outdoor temperature -8℃
- Dew point temperature comparison note: indoor temperature 20℃, relative humidity 60%.
- LandVac outdoor temperature -40℃
The high vacuum interspace of LandVac effectively blocks sound transmission. Human ear is quite sensitive. For every 5 dB, of noise increase, the effect on auditory experiences differs by 3 to 4 times. The weighted sound insulation measurement indicates that an outdoor noise level of 75 dB, can be reduced by 39 dB by LandVac, while the typical reduction by regular laminated glass is only 29 dB. It has a remarkable soundproofing effect against medium and low frequency noise such as traffic and construction noise that disturb our daily lives the most.
Thanks to the high vacuum interspace of LandVac, there is no thermal expansion or contraction even if the elevation of the location where it’s used is largely different from where it’s manufactured. The heat transfer coefficient of LandVac remains constant regardless of whether it’s mounted horizontally or with an angle, making it suitable for energy efficient roofing or slope installation.
