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InteriorInterior
PerformaTech Low E Double Glazing
Description

PerformaTech is a solar control Low-E glass, which keeps the building cool in summer and warm in winter. It can be used for residential or commercial buildings alike, either for traditional windows or doors,  facades or overhead glazing. It is suited for applications that require good solar control whilst maintaining high light transmission and clarity. 

PerformaTech balances the advantages of high performance and very neutral solar control product with:

  • high light transmission 73% gives a high degree of neutrality both in transmission and exterior reflection
  • a very low SHGC-value of 0.35, reduces solar gain by as much as 65%
  • an excellent U-value of 1.1 W/m2K

PerformaTech can be used to create more comfortable interiors by reducing overheating and the need for costly air conditioning, whilst at the same time noticeable reducing heat loss.  It can only be used in a double-glazed unit.

Key Features
  • High‑performance solar control Low‑E glass that balances strong thermal insulation with good natural light transmission.
  • Superior thermal comfort — keeps spaces comfortable year‑round by retaining heat in winter and reducing heat gain in summer.
  • High daylight clarity with neutral appearance, offering a good ratio of light transmission to radiant heat reduction.
  • Versatile design flexibility because it combines light, solar control and insulation, suitable for many architectural applications.
  • Delivered in insulated glass units with argon gas fill and Low‑E coating for enhanced energy efficiency.
  • Neutral aesthetic with controlled exterior reflectance and modest solar heat gain coefficient, making it suitable for facades and highly glazed areas.
Scope of Use
  • Suitable for residential windows and doors, including houses and apartments.
  • Can be used in multi-story apartments. 
  • Appropriate for commercial windows and doors. 
  • Applicable in facades, sliding doors, overhead glazing and curtain wall systems. 
Limitations on Use
  • Available only in specific glass thicknesses (4, 5, 6, 8, and 10 mm)
  • Size limits: max. 4500x2700mm
  • Soft Low-E coating constraint: The soft Low-E coating must be sealed within an insulated glass unit (IGU) and cannot be used as single glazing, limiting where it can be applied. 
Other Performance Attributes
  • High light transmission 73% gives a high degree of neutrality in transmission and low reflection
  • An excellent U-value of 1.1 W/m2K

Visible Light: ( 4mm PerformaTech // 14mm Argon // 4mm Clear )

  • Transmittance: 73%
  • Outdoor Reflectance: 13%
  • Indoor Reflectance: 14%

Heat Gain:

  • SHGC: 35%
  • Shading Coefficient: 40%

Fading / Tdw ISO: 0.65 (blocks 47% of fading / UV energy)

Documents
BPIR: Insulated Glass Units (IGU)

2025

Care & Maintenance - Glass
Product Warranty
Product Warranty - Terms & Conditions
High Performance Low-E Triple Glazing

2024

Viridian Glass DGU Low E Brochure

Viridian Glass is New Zealand’s leading glass supplier and processor. It delivers high-performance custom glass solutions for residential and commercial projects nationwide.

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