Low E Insulated Glass Unit

Typical Performance Metrics

The data below represents standard industry ranges for high-performance double-glazed units with single/double silver Low-E coatings on surface #2.

Thermal & Solar Performance

• U-Value (Air Filled): ≈1.6  to  1.8 W/(m²·K)(Metric) / ≈ 0.28 to 0.32 Btu/(h·ft²·°F) (Imperial)

• U-Value (Argon Filled): ≈1.2 to 1.4 W/(m²·K)(Metric) / ≈ 0.21 to 0.25 Btu/(h·ft²·°F) (Imperial)

• Solar Heat Gain Coefficient (SHGC): 0.25 to 0.45 (Adjustable based on project location and climate zone requirements)

• Visible Light Transmittance (VLT): 50% to 70% (Provides optimal daylighting while controlling glare)

Acoustic & Mechanical Parameters

• Sound Transmission Class (STC): 35 to 40dB (Can be further optimized using asymmetric glass thicknesses or laminated glass configurations)

• Maximum Manufacturing Size: Up to 2500mmx5000mm(Standard commercial jumper sizes, subject to specific project wind load calculations)

3. Component Options for Specification

• Spacer Type: Standard Aluminum Spacer / Warm Edge Spacer System (for improved condensation resistance and lower perimeter U-values).

• Gas Filling: 90% Premium Argon Gas / Standard Dry Air.

• Primary Seal: Polyisobutylene (PIB).

• Secondary Seal: High-modulus Silicone Structural Sealant (for structural glazing glass curtain walls) / Polysulfide Sealant (for punched windows).

Q1: What standard configurations do we offer for our Low-E insulated glass units (Low-E IGUs), and can we customize them for high-wind load projects?

A: We standardly manufacture common configurations such as 6mm + 16A + 6mm and 8mm+ 15A + 8mm using fully tempered or heat-strengthened glass. For demanding structural glazing glass and commercial curtain wall projects, we can adapt our production lines to accommodate asymmetric glass thicknesses and larger jumbo sizes to help you meet specific wind load and engineering calculations.

Q2: How do we ensure the long-term gas retention of our argon-filled IGUs during the manufacturing process?

A: Longevity is built directly into our automated assembly lines, where we utilize an advanced dual-seal system. We apply a high-precision primary polyisobutylene (PIB) seal followed by a high-modulus structural silicone secondary sealant to minimize gas migration. This strict processing control helps our high-performance insulated glass maintain its low U-values and thermal insulation performance over an extended service life.

Q3: Can we combine our low-e double glazing assemblies with warm edge spacer technology to prevent perimeter condensation?

A: Yes, our production facility seamlessly integrates advanced warm edge spacer systems as a high-performance alternative to standard aluminum spacers. By incorporating these low-conductivity spacers into our glass unit fabrication, we help curtain wall contractors significantly improve overall condensation resistance and minimize thermal bridging at the window glazing unit perimeter.

Q4: How do we control the consistency of the Solar Heat Gain Coefficient (SHGC) and Visible Light Transmittance (VLT) across large production batches?

A: We partner with industry-leading float glass manufacturers to source premium Low-E glass coatings. By combining these raw materials with our automated cutting, washing, and glass positioning procedures, we ensure that critical optical and thermal performance metrics—such as SHGC and VLT—remain highly uniform across every architectural insulated glass unit we deliver to your job site.

Q5: What quality control steps do we take during production to ensure the acoustic performance (STC ratings) of our energy-saving insulated glass?

A: We ensure targeted Sound Transmission Class (STC) ratings by maintaining strict control over unit sealing and air space consistency. Our factory utilizes automated gas-filling and pressing equipment to achieve perfectly uniform air or argon cavities. Additionally, we can integrate laminated glass components or varied glass thicknesses into the IGU build-up on our production lines to optimize acoustic dampening for high-noise commercial environments.