Low-E Glass

Description

1. Product Overview

Low-E (Low Emissivity) Glass is a high-performance, vacuum-sputter-coated architectural glass engineered to significantly reduce thermal transfer while maximizing visible light transmission. Its primary industrial use is in insulated glass units (IGUs) for commercial buildings, residential windows, and cold-storage facades. The key value proposition is a superior solar heat gain coefficient (SHGC) and U-factor, enabling building owners to cut HVAC energy consumption by up to 30–40%. Strategically, this product is critical for global green building certifications (LEED, BREEAM) and net-zero construction mandates, positioning it as the baseline specification for energy-compliant glazing in every major market.

2. Key Specifications & Technical Characteristics

• Material Components: Soda-lime-silica glass substrate with multi-layer silver, tin oxide, and titanium dioxide sputtered coating (pyrolytic or magnetron-sputtered).

• Purity/Grade: Architectural grade, meeting ASTM C1376 and EN 1096 standards; coating uniformity ≤ ±0.02 emissivity.

• Physical Characteristics:

  • Form: Flat, annealed or heat-strengthened sheets

  • Color: Neutral, clear, or low-iron (visible light transmission 70–84%)

  • Thickness: 3 mm to 12 mm (customizable)

  • Emissivity: ≤ 0.04 (single silver) / ≤ 0.02 (double silver) / ≤ 0.01 (triple silver)

• Packaging Options: Airtight interleaved paper separation, shrink-wrapped pallets with edge protectors, and wooden export crates (IPPC-certified).

• Shelf Life: Unlimited if stored dry, indoors, at 15–30°C; coated side protected from moisture contact (recommend installation within 12 months of delivery).

3. Core Industrial Applications

• Primary Industries: Commercial high-rise construction, residential window manufacturing, cold chain logistics (freezer doors), and automotive glazing (secondary).

• Operational Use Cases:

  • Curtain wall systems in office towers → reduces solar heat gain in summer and heat loss in winter.

  • Insulated glass units (IGUs) for passive houses → maintains interior temperature with minimal external energy input.

  • Refrigerated display cases → prevents condensation and frost while lowering compressor runtime.

• Performance Advantages vs. Alternatives:

  • Compared to standard float glass: Low-E reduces U-factor from 1.1 to 0.28 W/m²K (up to 75% better insulation).

  • Compared to tinted glass: Achieves same SHGC without sacrificing daylight (higher visible light transmission by 20–30%).

  • Durability: Hard-coated (pyrolytic) options withstand fabrication and tempering; soft-coated (sputtered) offers maximum solar control for sealed units only.

4. Competitive Advantages

• Quality Consistency: Statistical process control (SPC) with 100% online emission spectrometry; every batch certified with emissivity variance < 0.005.

• Supply Reliability: Vertically integrated float line to coating facility; maintained safety stock of 150,000 m² across three regional DCs; 98% on-time-in-full track record.

• Logistics Capability: Break-bulk and custom-cut sizes (maximum 3,210 × 6,000 mm) to minimize your on-site scrap; shock-resistant packaging with real-time GPS tracking.

• Price Competitiveness: Tiered volume pricing (5–8% below EU/US domestic coated glass) due to energy-efficient coating lines and access to low-cost flat glass substrate.

• Sustainability: Low-E coating reduces building operational carbon by ~22 kg CO₂/m²/year; glass 100% recyclable; manufacturing powered by 40% renewable energy (EPD available upon request).

• Technical Support: Dedicated BIM files, thermal simulation reports, and on-site coating durability training; 10-year warranty against coating degradation under normal IGU conditions.

5. Commercial & Supply Information

• Minimum Order Quantity (MOQ): 20 metric tons (approximately 8,000 m² for 5 mm thickness)

• Bulk 20MT Loading Capacity (MT per container):

  • 20-ft standard container: 18–20 MT (depending on interleaving and crate design)

  • 40-ft high-cube container: 22–24 MT (recommended for maximizing freight efficiency)