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Optimum Vacuum Glazing part L concept
LandVac Optimum Vacuum Glazing:

The magic bullet that smashes through Part L Regulations.

A futuristic solution for reglazing modern windows or manufacturing new efficient windows.

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High performing glazing for future build projects

Achieve peak performance with LandVac Vacuum Glazing the industry leader in energy efficiency, reliability, and soundproofing

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LandVac Optimum Vacuum Glazing cross section
Don’t redesign your profiles, just switch to a better glazing specification

0.4 centre pane U-value, industry leading whole window U-values*.

Aluminium 1.1 - 1.3 W/m2K
Timber 0.9 - 1.0 W/m2K
Steel 1.4 - 1.5 W/m2K
uPVC 0.6 - 1.0 W/m2K

25.1mm overall unit thickness
G-Value between 0.32 - 0.59
41dB Acoustic rating
Toughened vacuum glazing unit with 6.8mm laminated outer pane for P1A compliance
10-Year warranty

LandVac Optimum vacuum glazing cad diagram
Thickness of double glazing with performance exceeding quad glazing!
*Figures are for guidance only, estimated based on average window size of 1230 x 1480 mm in typical material window profiles.


Compared to standard Double and Triple Glazing, Vacuum Glazing has:

  • More energy efficiency
  • Higher noise reduction
  • Better light transmission
  • Slimmer profile
  • Longer service life
  • More energy efficiency

Double Glazing

Double Glazing Cross Section

Triple Glazing

Triple Glazing Cross Section

LandVac Optimum Vacuum Glazing

LandVac Optimum image
Double Glazing Triple Glazing LandVac Optimum
Overall Thickness 28mm 38 - 48mm 25.1mm
U-Value 1.0 - 1.9 0.7 - 1.0 0.4
Acoustic Reduction (RW) ~31dB ~35dB 41dB
Estimates Lifespan 10 - 25 years 10 - 25 years 10 - 25 years

Data Table

Download a PDF of this data


LandVac Optimum (Hybrid)

Product Series Indoor to Outdoor U-Value (W/m2K) Visible Light Transmittance Outdoor Reflectivity SHGC (g-value) Shading Coefficient Weighted Sound Reduction Index
4T+0.3V+4TL (S1.16) + 9Ar + 3 + 0.76P + 3 0.4 72% 18% 0.59 0.68 41dB
4T+0.3V+4TL (D80) + 9Ar + 3 + 0.76P + 3 0.4 63% 19% 0.46 0.53 41dB
4TL (S1.16) + 0.3V+4TL (S1.16) + 9Ar + 3 + 0.76P + 3 0.4 70% 15% 0.48 0.55 41dB
4TL (D80) + 0.3V+4TL (D80) + 9Ar + 3 + 0.76P + 3 0.4 54% 16% 0.32 0.37 41dB
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LandVac is available in a variety of shapes. Here are just a few examples to inspire your project:

LandVac Vacuum Glazing profile shape
LandVac Vacuum Glazing profile shape
LandVac Vacuum Glazing profile shape
LandVac Vacuum Glazing profile shape
LandVac Vacuum Glazing profile shape

Width to Height maximum ratio 1:6 for 8.3mm. Bigger than that and it will be 10.3mm
Any shape with a right angle and single point of radius. Isosolese triangles or right angled triangles with a hypotenuse greater that 370mm.
CAD drawings must be supplied for any shape orders.
General Criteria and Specification Notes
Maximum Unit Size 1500mm x 2500mm
Minimum Unit Size 300mm x 300mm. Please note that minimum unit size for pricing is 0.3m2.
All LandVac Glass is toughened and has been certified to BS12150-1.
U-value certified using hot box testing at IFT Rosenheim on 9.3 unit.

Landvac Optimum Glazing: The Cost-Effective and High-Performance Solution for Energy-Efficient Projects

LandVac Optimum glazing is an industry-leading product in terms of performance and reliability. This vacuum insulated glass unit boasts a thermal insulation value of up to 0.4 W/m²K, which is significantly better than the industry average. With this level of insulation, buildings can greatly reduce their energy consumption, resulting in lower energy bills and reduced carbon footprint.

Furthermore, LandVac Optimum glazing is considerably less expensive than its competitors, making it an excellent choice for those seeking a high-performance product at a lower cost. In addition, it can be easily installed into standard profile frames, so installers and manufacturers do not need to redesign their profiles to accommodate it. This makes the transition to LandVac Optimum glazing seamless, while still providing the superior energy efficiency and insulation that this product is known for. Its reliability, coupled with its lower cost, make it an ideal choice for energy-efficient projects.

LandVac Optimum glazing - a modern, insulated living room
Futuristic buildings on rocks to illustrate vacuum glazing concept
Alternative view of futuristic buildings as an example of how vacuum glazing is effective
Night time show of futuristic building on rocks to illustrate the effectiveness of vacuum glazing